Readme

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+# AI Features Documentation
+
+## 1. Overview
+
+This document explains all AI-powered capabilities currently implemented in the BFSI contract analysis application, how data flows through the system, what resilience mechanisms are in place, and how explainability is surfaced to users.
+
+### 1.1 AI Flow for Juniors (Start Here)
+
+If you are new to the codebase, this is the exact AI lifecycle from upload to UI proof:
+
+1. User uploads a document and opens it in dashboard details.
+2. Analyze action validates ownership and marks status as PROCESSING.
+3. AI prevalidation checks if the file is a real contract.
+4. Main extraction runs with primary model; fallback model is used if needed.
+5. Output is parsed, repaired when malformed, normalized to strict shape, and validated.
+6. Results are persisted in DB (title, dates, premium, summary, key points, explainability evidence, extracted text).
+7. Continuous learning metadata (aiMeta) is stored in keyPoints for future adaptive prompts.
+8. UI shows extracted fields and proof icons next to each critical field.
+9. Clicking a proof icon opens Field Proof modal:
+
+- tries to map evidence snippet to exact line(s) in extracted text using normalized fuzzy matching,
+- runs deterministic field-aware checks first (exact snippet/date/value line) before fuzzy scoring,
+- falls back to snippet evidence when precise line mapping is not possible.
+
+11. Premium amount keeps source currency semantics:
+
+- AI is instructed to return numeric premium without conversion,
+- AI also returns premiumCurrency (for example TND, USD, EUR),
+- UI displays premium using detected source currency (no forced EUR formatting).
+
+10. Q&A and reminders reuse the persisted AI output.
+
+### 1.2 Where to Read in Code
+
+- Orchestration: `lib/actions/contract.action.ts`
+- AI core + retries + validation: `lib/services/ai.service.ts`
+- Prompt contracts: `lib/services/ai/analysis.prompt.ts`
+- Parser + normalizer: `lib/services/ai/analysis.parser.ts`, `lib/services/ai/analysis.normalizer.ts`
+- UI proof rendering: `components/views/dashboard/contracts-list.tsx`
+
+The AI subsystem is centered on:
+
+- Contract prevalidation (contract vs non-contract detection)
+- Contract analysis and structured field extraction
+- Multi-model fallback and JSON repair
+- Normalization and validation hardening
+- Explainability evidence for extracted fields
+- Multilingual contract Q&A
+- AI-derived deadline reminders
+- Field-level proof modal with line-context evidence mapping
+- Snippet text search inside extracted snippets
+- Continuous learning context from previous analyses (without schema migration)
+
+## 2. Tech and Configuration
+
+### 2.1 Core Components
+
+- Next.js server actions for orchestration
+- Gemini via @google/generative-ai for extraction and Q&A
+- Prisma for persistence
+- Clerk for authenticated user context
+- React client UI for details modal, field-proof modal, and chat
+
+### 2.2 Models
+
+- Primary model: gemini-2.5-flash
+- Optional secondary Gemini model: AI_MODEL_SECONDARY_GEMINI
+- Fallback model provider: Mistral AI (default: mistral-large-latest, vision: pixtral-large-latest)
+- Gemini models are de-duplicated and iterated in order before Mistral fallback
+- Mistral extraction fallback supports both text and image inputs via Pixtral vision; JSON repair and Q&A fallback are text-based
+
+### 2.3 Environment Variables
+
+- AI_API_KEY (or AI_API_KEY2 / AI_API_KEY3 fallback)
+- AI_MODEL_PRIMARY (optional override)
+- AI_MODEL_SECONDARY_GEMINI (optional override)
+- AI_MODEL_SECONDARY (legacy alias supported for compatibility)
+- AI_MODEL_FALLBACK (optional override)
+- MISTRAL_API_KEY
+- AI_MODEL_MISTRAL_VISION (optional, default: pixtral-large-latest)
+
+## 3. AI Capability Matrix
+
+| Capability                    | Trigger                           | Output                                                             | Main File                                                                                                                   |
+| ----------------------------- | --------------------------------- | ------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------- |
+| Prevalidation                 | Analyze action                    | isValidContract, confidence, reason                                | lib/services/ai.service.ts                                                                                                  |
+| Structured extraction         | Analyze action                    | title/type/provider/policy/dates/premium/summary/key points        | lib/services/ai.service.ts                                                                                                  |
+| Premium currency preservation | Analyze + normalize + UI display  | premium + premiumCurrency with no currency conversion              | lib/services/ai/analysis.prompt.ts + lib/services/ai/analysis.normalizer.ts + components/views/dashboard/contracts-list.tsx |
+| Explainability extraction     | Structured extraction prompt      | field-level why + snippet + hints                                  | lib/services/ai/analysis.prompt.ts                                                                                          |
+| JSON repair                   | Parse failure                     | corrected JSON                                                     | lib/services/ai.service.ts                                                                                                  |
+| Emergency extraction          | Repair failure                    | minimal valid analysis JSON                                        | lib/services/ai.service.ts                                                                                                  |
+| Normalization                 | Post-parse                        | canonical, bounded, safe analysis object                           | lib/services/ai/analysis.normalizer.ts                                                                                      |
+| Contract validity assertion   | Post-normalization                | pass/fail with invalid-contract reason                             | lib/services/ai.service.ts                                                                                                  |
+| Contract Q&A                  | Ask action                        | multilingual business/legal-oriented answer                        | lib/services/ai.service.ts                                                                                                  |
+| Deadline reminders            | Contract save after AI completion | DEADLINE notifications at 30/15/7 days                             | lib/services/notification.service.ts                                                                                        |
+| Explainability UI             | Details modal                     | field-level proof icon, line-context modal, fuzzy evidence mapping | components/views/dashboard/contracts-list.tsx                                                                               |
+| Evidence quick copy           | Details modal                     | one-click clipboard copy of compliance evidence bundle             | components/views/dashboard/contracts-list.tsx                                                                               |
+| Snippet search                | Details modal                     | text/field search inside extracted snippets                        | components/views/dashboard/contracts-list.tsx                                                                               |
+| Continuous learning context   | Every completed analysis          | adaptive context enriched from historical aiMeta/evidence          | lib/actions/contract.action.ts + lib/services/ai.service.ts                                                                 |
+
+## 4. Feature Details and Sequence Diagrams
+
+---
+
+## 4.1 AI Contract Analysis End-to-End
+
+### What it does
+
+When a user clicks Analyze, the system validates ownership, marks contract as PROCESSING, performs AI prevalidation and extraction, validates results, saves structured output, and returns success or failure.
+
+### Key resilience points
+
+- Ownership checks before all sensitive operations
+- Invalid-contract short-circuit based on AI confidence and heuristics
+- Multi-pass retry with correction hints
+- Multi-model fallback
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant U as User
+  participant UI as Contracts UI
+  participant SA as contract.action analyzeContractAction
+  participant CS as ContractService
+  participant NS as NotificationService
+  participant AIS as AIService
+  participant G as Gemini
+  participant DB as Prisma DB
+
+  U->>UI: Click Analyze
+  UI->>SA: analyzeContractAction(contractId)
+  SA->>CS: getById + ownership check
+  SA->>CS: updateStatus(PROCESSING)
+  SA->>NS: create ANALYSIS_STARTED notification
+  SA->>AIS: analyzeContract(fileUrl, userId, fileName)
+  AIS->>G: prevalidation prompt + file
+  G-->>AIS: {isValidContract, confidence, reason}
+  AIS->>G: analysis prompt + file
+  G-->>AIS: analysis JSON/raw text
+  AIS->>AIS: parse, repair if needed, normalize, assert validity
+  AIS-->>SA: NormalizedAnalysis
+  SA->>CS: updateWithAIResults(COMPLETED)
+  CS->>DB: Persist extracted fields + keyPoints + extractedText
+  CS->>NS: checkUpcomingDeadlines(userId)
+  SA->>NS: create ANALYSIS_SUCCESS notification
+  SA-->>UI: success + analyzed contract payload
+```
+
+---
+
+## 4.2 Contract Prevalidation Gate
+
+### What it does
+
+Before expensive extraction, AI classifies whether the uploaded document is actually a contract in any language.
+
+### Decision rules
+
+- Rejects obvious non-contract files (invoices, IDs, blank pages, random images)
+- If parse of prevalidation JSON fails, system defaults to permissive moderate confidence to avoid false negatives due malformed precheck output
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant AIS as AIService
+  participant G1 as Gemini Primary
+  participant G2 as Gemini Secondary (optional)
+
+  AIS->>G1: buildPrevalidationPrompt + inline file
+  alt Primary succeeds
+    G1-->>AIS: JSON precheck
+  else Primary fails
+    AIS->>G2: same precheck request (if configured)
+    G2-->>AIS: JSON precheck
+  end
+  AIS->>AIS: parse precheck JSON
+  alt parse failed
+    AIS-->>AIS: Assume valid with moderate confidence
+  else parsed
+    AIS-->>AIS: Return isValidContract/confidence/reason
+  end
+```
+
+---
+
+## 4.3 Multi-Model Extraction + JSON Repair + Emergency Fallback
+
+### What it does
+
+If extraction output is malformed or incomplete, the service tries progressively stronger recovery paths.
+
+### Recovery layers
+
+1. Primary/Fallback model extraction with strict JSON mime type
+2. Lenient generation (no forced responseMimeType JSON)
+3. JSON repair pass with schema guidance
+4. Emergency field extraction from raw text patterns
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant AIS as AIService
+  participant GP as Gemini Primary
+  participant GS as Gemini Secondary (optional)
+  participant MR as Mistral AI Fallback
+
+  AIS->>GP: generate analysis (strict JSON)
+  alt GP success with usable output
+    GP-->>AIS: text
+  else GP fails
+    AIS->>GS: generate analysis (strict JSON)
+    alt GS success
+      GS-->>AIS: text
+    else GS fails
+      AIS->>GP: lenient generation attempt
+      alt lenient success
+        GP-->>AIS: raw text
+      else lenient fails
+        AIS->>MR: generate analysis (strict JSON)
+        MR-->>AIS: text
+      end
+    end
+  end
+
+  AIS->>AIS: parseJsonResponse
+  alt parse failed
+    AIS->>MR: repairMalformedJson(originalText, parseError)
+    alt repair success
+      MR-->>AIS: repaired JSON text
+      AIS->>AIS: parse repaired JSON
+    else repair failed
+      AIS->>AIS: emergencyExtractFields(rawText)
+      AIS->>AIS: parse emergency JSON
+    end
+  end
+```
+
+---
+
+## 4.4 Normalization, Validation, and Persistence
+
+### What it does
+
+Raw model output is converted into a strict normalized contract object and validated before DB write.
+
+### Normalization highlights
+
+- Contract type alias mapping into supported enum
+- Date coercion to YYYY-MM-DD
+- Safe string truncation and null handling
+- Premium normalization and bounds
+- Explainability normalization with bounded field lengths and confidence clamping
+- Extracted text cap at 12000 chars
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant AIS as AIService
+  participant N as analysis.normalizer
+  participant V as assertValidContract
+  participant SA as contract.action
+  participant CS as ContractService
+  participant DB as Prisma DB
+
+  AIS->>N: normalizeAnalysis(parsed)
+  N-->>AIS: NormalizedAnalysis
+  AIS->>V: assertValidContract(raw, normalized)
+  alt valid
+    AIS-->>SA: normalized analysis
+    SA->>CS: updateWithAIResults
+    CS->>DB: update contract to COMPLETED
+  else invalid
+    V-->>SA: INVALID_CONTRACT error
+    SA->>CS: markFailed
+  end
+```
+
+---
+
+## 4.5 Explainability Pipeline and UI Interaction
+
+### What it does
+
+The model is instructed to provide extraction evidence per field. The UI renders a compact proof icon near each extracted field and opens a dedicated Field Proof modal with source snippet, metadata, and line-context evidence.
+
+### Explainability object shape
+
+- field
+- why
+- sourceSnippet
+- sourceHints.page
+- sourceHints.section
+- sourceHints.confidence
+
+### UI enhancements implemented
+
+- Field-level proof icon beside core extracted fields (title/provider/policy/dates/premium)
+- Field Proof modal with fixed professional layout (stable regardless of content size)
+- Normalized fuzzy line matching for snippet-to-line mapping in extracted text
+- Fallback to extracted field value when explicit explainability snippet is absent
+- Confidence/page/section metadata surfaced in proof summary chips
+- Line-context panel with explicit quality state (resolved vs fallback evidence)
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant AI as Gemini Extraction
+  participant N as analysis.normalizer
+  participant DB as Prisma DB
+  participant UI as Contracts Details Modal
+  participant User as User
+
+  AI-->>N: keyPoints.explainability[]
+  N->>N: validate/sanitize/trim explainability items
+  N->>DB: persist explainability in keyPoints JSON
+  UI->>DB: fetch contract details (includes keyPoints)
+  DB-->>UI: explainability array
+  User->>UI: Click field proof icon
+  UI->>UI: map field to explainability evidence
+  UI->>UI: normalized fuzzy search in extracted text lines/windows
+  alt line mapping found
+    UI->>UI: show line number + context window
+  else mapping unavailable
+    UI->>UI: show fallback snippet evidence with quality badge
+  end
+```
+
+---
+
+## 4.8 Continuous Learning Pipeline (Safe, No Schema Migration)
+
+### What it does
+
+The system now gets smarter after each completed analysis by persisting learned metadata into `keyPoints.aiMeta`, then reusing it in `buildAdaptiveContext` for future analyses.
+
+### Why this design is safe
+
+- No Prisma schema changes required
+- Uses existing JSON storage (`keyPoints`)
+- Backward compatible with older records
+- If aiMeta is missing, system gracefully falls back to previous behavior
+
+### Learning signals currently used
+
+- Dominant learned languages
+- Frequent key roles (from extracted key people)
+- Most evidenced extracted fields (from explainability)
+- Average explainability confidence score
+- Existing prior signals already used: top contract types/providers/policy patterns/summary length
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant SA as analyzeContractAction
+  participant AIS as AIService
+  participant CS as ContractService
+  participant DB as Prisma DB
+
+  SA->>AIS: analyzeContract(...)
+  AIS-->>SA: normalized analysis + explainability + language/people/contacts
+  SA->>SA: merge aiMeta into keyPoints
+  SA->>CS: updateWithAIResults(keyPoints.aiMeta)
+  CS->>DB: persist COMPLETED contract
+
+  Note over AIS,DB: Next analysis for same user
+  AIS->>DB: fetch last completed examples with keyPoints
+  AIS->>AIS: derive adaptive learning signals from aiMeta + explainability
+  AIS->>AIS: inject enriched adaptive context into next analysis prompt
+```
+
+---
+
+## 4.6 Multilingual Contract Q&A
+
+### What it does
+
+Users ask follow-up questions about a selected contract. The AI answers in the contract language using extracted fields, key points, and extracted text context.
+
+### Behavior highlights
+
+- Language-aware response instruction (en, fr, de, es, it, pt, nl, pl, ja, zh, ar)
+- Contract-type-specific guidance for domain emphasis
+- Output sanitization strips markdown artifacts
+- Fallback across configured model list
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant U as User
+  participant UI as Ask Modal
+  participant SA as askContractQuestionAction
+  participant CS as ContractService
+  participant AIS as AIService
+  participant G as Gemini
+
+  U->>UI: Ask question
+  UI->>SA: askContractQuestionAction(contractId, question)
+  SA->>CS: getById + ownership check
+  SA->>AIS: askAboutContract(question, contractContext)
+  AIS->>AIS: determine language + type guidance
+  AIS->>G: Q&A prompt with metadata, summary, keyPoints, extracted text
+  G-->>AIS: answer text
+  AIS->>AIS: sanitize formatting artifacts
+  AIS-->>SA: final answer
+  SA-->>UI: answer
+```
+
+---
+
+## 4.7 AI-Derived Deadline Notifications
+
+### What it does
+
+After successful AI extraction and save, reminder notifications are generated from extracted contract end date.
+
+### Reminder policy
+
+- 30 days: CRITICAL
+- 15 days: WARNING
+- 7 days: URGENT
+- Duplicate prevention based on recent existing reminder action type
+
+### Sequence Diagram
+
+```mermaid
+sequenceDiagram
+  autonumber
+  participant SA as analyzeContractAction
+  participant CS as ContractService
+  participant NS as NotificationService
+  participant DB as Prisma DB
+
+  SA->>CS: updateWithAIResults(COMPLETED)
+  CS->>NS: checkUpcomingDeadlines(userId)
+  NS->>DB: find COMPLETED contracts with endDate
+  loop each contract
+    NS->>NS: compute daysUntilExpiration
+    alt day is 30/15/7 and no duplicate today
+      NS->>DB: create DEADLINE notification
+    end
+  end
+  NS-->>CS: created count summary
+```
+
+## 5. Data Contracts
+
+### 5.1 Normalized Analysis (core)
+
+- title
+- type
+- provider
+- policyNumber
+- startDate
+- endDate
+- premium
+- summary
+- extractedText
+- keyPoints (guarantees, exclusions, franchise, importantDates, explainability)
+- language
+- keyPeople
+- contactInfo
+- importantContacts
+- relevantDates
+
+### 5.2 Explainability Item
+
+- field: extracted field identifier
+- why: concise reasoning sentence
+- sourceSnippet: quoted support from document
+- sourceHints: page/section/confidence for audit context
+
+## 6. Security and Guardrails
+
+- Ownership validation before analyze and ask operations
+- Contract validity checks to reject unrelated uploads
+- Bounded extracted text and structured truncation to reduce prompt and storage risk
+- Retry and fallback paths to reduce failure rate without unsafe assumptions
+- Missing-notification-table safe handling in notification service
+
+## 7. Failure Modes and Handling
+
+### 7.1 Non-contract file
+
+- Outcome: analysis fails with INVALID_CONTRACT code
+- User feedback: explicit invalid contract reason
+
+### 7.2 Malformed AI JSON
+
+- Outcome: repair pass, then emergency extraction fallback
+- User impact: improved completion rate with bounded quality fallback
+
+### 7.3 Model/API/key issues
+
+- Outcome: explicit error messages for API key/model configuration
+
+### 7.4 Notification table missing
+
+- Outcome: notification operations degrade gracefully without blocking core contract workflow
+
+## 8. UX Features for Explainability and Compliance
+
+- Proof icon per extracted field for one-click transparency
+- Professional Field Proof modal with fixed sections and stable dimensions
+- Fuzzy snippet-to-line mapping to reduce unresolved line cases
+- Deterministic field-specific matching before fuzzy mode (especially for dates)
+- Fallback evidence mode when OCR/formatting prevents exact line resolution
+- Confidence/page/section metadata chips for compliance readability
+- Extracted snippets section with search and field reference tags
+
+## 9. Test Plan (Step-by-Step)
+
+### 9.1 Field Proof Resolution
+
+1. Upload and analyze a contract with clear dates/amounts.
+2. Open Details modal.
+3. Click proof icon next to `Title`, `End Date`, or `Premium`.
+4. Verify Field Proof modal opens with line/page/section/confidence chips.
+5. Verify line context appears with numbered rows and a marker on matched line.
+
+### 9.2 Snippet Search Box
+
+1. In the `Extracted Text Snippets` section, type a keyword (for example `premium`, `TND`, `2044`, `endDate`).
+2. Verify only matching snippets remain visible.
+3. Clear the search and verify all snippets return.
+
+### 9.3 Fallback Evidence Mode
+
+1. Test with a contract where OCR quality is noisy or formatting is table-heavy.
+2. Click field proof icon for a difficult field.
+3. Verify modal still shows exact source snippet with a fallback quality badge.
+4. Verify user still receives proof even when exact line number is unavailable.
+
+### 9.4 Layout Consistency
+
+1. Open field proof for short and very long snippets.
+2. Verify modal section heights remain visually consistent.
+3. Verify metadata chips keep a stable grid layout across content lengths.
+
+### 9.5 Continuous Learning (AI Gets Smarter Over Time)
+
+1. Analyze at least 3 contracts from the same provider or domain.
+2. Analyze a 4th similar contract.
+3. Verify extraction quality improves in consistency for:
+
+- provider naming style
+- policy number patterns
+- detected language and role patterns
+- evidence confidence on common fields
+
+4. In server logs, confirm adaptive context includes learned indicators (languages/evidenced fields/roles/confidence).
+
+### 9.6 Multilingual Q&A Consistency
+
+1. Analyze a non-English contract (for example French).
+2. Ask a question in Ask modal.
+3. Verify answer is in contract language and aligned to extracted context.
+
+## 10. Suggested Operational Checks
+
+- Run build after AI prompt or normalizer changes
+- Spot-check at least one document per supported major language
+- Verify explainability has non-empty source snippets for key fields
+- Verify deadline notifications for synthetic end dates at 30/15/7 days
+- Validate ask flow stays in detected contract language
+
+## 11. File Index
+
+- lib/actions/contract.action.ts
+- lib/services/ai.service.ts
+- lib/services/ai/analysis.prompt.ts
+- lib/services/ai/analysis.normalizer.ts
+- lib/services/ai/analysis.types.ts
+- lib/services/contract.service.ts
+- lib/services/notification.service.ts
+- components/views/dashboard/contracts-list.tsx
+- types/contract.types.ts
--- a/docs/DASHBOARD_REDESIGN.md
+++ b/docs/DASHBOARD_REDESIGN.md
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+# Complete Dashboard Redesign - Implementation Summary
+
+## 🎯 Architecture Overview
+
+The dashboard has been reorganized into two distinct routes with a persistent navigation sidebar:
+
+### Route Structure
+
+```
+/dashboard      → Analytics Hub (Stats & Charts)
+/contacts       → Contracts Manager (Upload & Management)
+```
+
+---
+
+## 📊 New /dashboard Route Features
+
+### 1. **Stats Components**
+
+- **6 Key Metric Cards** displaying:
+  - Total Contracts (with trend indicator)
+  - Analyzed Contracts (with analysis rate %)
+  - In Progress (with processing indicator)
+  - Failed Contracts (with alert)
+  - Average Premium ($)
+  - Analysis Success Rate (%)
+
+- **Visual Design:**
+  - Gradient backgrounds (blue, green, amber, red, purple, cyan)
+  - Icon indicators for each metric
+  - Trend indicators with directional arrows
+  - Smooth animations on load
+
+### 2. **Advanced Charts (using Recharts)**
+
+- **Upload Trends Chart** (Area Chart)
+  - 30-day trend visualization
+  - Interactive tooltips
+  - Gradient fill effects
+- **Contract Type Distribution** (Bar Chart)
+  - Visual breakdown by contract type
+  - Color-coded bars
+  - Responsive design
+- **Contract Status Overview** (Pie Chart)
+  - Visual representation of processing statuses
+  - Color-coded segments
+  - Interactive labels
+- **Distribution Radar Chart** (Coming in enhanced version)
+  - Multi-dimensional data visualization
+
+### 3. **Key Insights Section**
+
+- **Analysis Efficiency Card**
+  - Success rate progress bar with animation
+  - Real-time calculation from database
+- **Processing Queue Card**
+  - In-progress contracts count
+  - Failed contracts indicator
+- **Premium Metrics Card**
+  - Total premium analysis
+  - Number of analyzed contracts
+
+### 4. **Quick Actions**
+
+- **Upload New Contract** → Links to /contacts
+- **View All Contracts** → Links to /contacts with count
+
+---
+
+## 🗂️ New /contacts Route Features
+
+### 1. **Professional Header**
+
+- Breadcrumb navigation back to dashboard
+- Gradient title with descriptive subtitle
+- Quick stats badges highlighting key features
+
+### 2. **Contract Upload Section**
+
+- Drag-and-drop file upload
+- AI-powered analysis indication
+- Real-time upload feedback
+
+### 3. **Contracts List & Management**
+
+- Existing contracts display with new styling
+- Analysis status indicators
+- Ask questions feature (existing, now integrated)
+- Contract details modal
+
+---
+
+## 🎨 Design System Enhancements
+
+### Visual Elements
+
+- **Animated Gradient Backgrounds**
+  - Floating blob animations in background
+  - Smooth color transitions
+  - Dark mode optimized
+
+- **Color Palette**
+  - Primary: Blue (#3B82F6)
+  - Accent: Gradient colors
+  - Semantic colors for status indicators
+
+- **Typography**
+  - Bold headlines with gradient text
+  - Clear visual hierarchy
+  - Responsive font sizing
+
+- **Animations**
+  - Fade-in effects on page load
+  - Smooth transitions between states
+  - Motion/Framer Motion integration
+  - Staggered card animations
+
+### Components
+
+- Shadcn/UI for consistent design
+- Custom stat cards with gradients
+- Backdrop blur effects
+- Border styling with transparency
+
+---
+
+## 🔧 Technical Implementation
+
+### New Files Created
+
+1. **Services**
+   - `lib/services/stats.service.ts` → Database queries for analytics
+   - `lib/actions/stats.action.ts` → Server action wrapper
+
+2. **Components**
+   - `components/views/dashboard/stat-cards.tsx` → Metric cards
+   - `components/views/dashboard/charts.tsx` → Recharts integration
+   - `components/views/dashboard/navigation.tsx` → Sidebar navigation
+   - `components/views/dashboard/contacts-header.tsx` → Contacts page header
+
+3. **Routes**
+   - `app/(dashboard)/contacts/layout.tsx` → Contacts route layout
+   - `app/(dashboard)/contacts/page.tsx` → Contacts page with upload & list
+
+4. **Updated Files**
+   - `app/(dashboard)/layout.tsx` → Sidebar integration
+   - `app/(dashboard)/dashboard/page.tsx` → New analytics dashboard
+
+---
+
+## 📈 Data & Analytics
+
+### Stats Service Features
+
+```typescript
+{
+  stats: {
+    totalContracts: number
+    analyzedContracts: number
+    processingContracts: number
+    failedContracts: number
+    analysisRate: percentage
+  },
+  chartData: {
+    byType: Array<{type, count}>
+    byStatus: Array<{status, count}>
+    trends: Array<{date, count}> // Last 30 days
+  },
+  premiumInfo: {
+    averagePremium: number
+    totalPremium: number
+    count: number
+  },
+  recentContracts: Array<{id, title, type, createdAt, premium}>
+}
+```
+
+### Database Queries
+
+- Aggregated counts by status, type, and date
+- Premium statistics (avg, sum, count)
+- 30-day trend analysis
+- Recent contracts ranking
+
+---
+
+## 🎯 Navigation System
+
+### Sidebar Features
+
+- **Logo with brand identity**
+- **Two main navigation items**
+  - Analytics (Dashboard)
+  - Contracts (Management)
+- **Theme toggle** (Light/Dark mode)
+- **Sign out button**
+- **Responsive active states**
+- **Smooth transitions and animations**
+
+---
+
+## 🚀 Performance & UX
+
+### Optimizations
+
+- Client-side state management for smooth interactions
+- Server-side analytics computation
+- Lazy loading of components
+- Efficient database queries with aggregation
+- Responsive design for all screen sizes
+
+### Accessibility
+
+- Semantic HTML structure
+- ARIA labels on icons
+- Clear visual hierarchy
+- High contrast ratios
+- Keyboard navigation support
+
+---
+
+## 📱 Responsive Design
+
+- **Desktop (1024px+)**: Full sidebar + expanded content
+- **Tablet (768px-1023px)**: Flexible grid layouts
+- **Mobile**: Responsive charts and card layouts
+
+---
+
+## 🎬 Next Steps & Enhancements
+
+### Future Improvements
+
+1. **Export Reports** → PDF/Excel export functionality
+2. **Advanced Filtering** → Filter contracts by date, type, status
+3. **Custom Dashboards** → User-customizable dashboard layouts
+4. **Real-time WebSocket Updates** → Live processing status
+5. **Performance Optimization** → Data caching and infinite scroll
+6. **Dark Mode Enhancements** → More sophisticated theme system
+7. **Mobile App** → Native mobile experience
+
+---
+
+## 🔐 Security & Authorization
+
+- User ID verification in all server actions
+- Clerk authentication integration
+- Database queries filtered by userId
+- Server-side data serialization
+
+---
+
+## 📦 Dependencies Used
+
+- `recharts` (v3.7.0) - Chart visualizations
+- `motion` - Animations
+- `lucide-react` - Icons
+- `shadcn/ui` - UI components
+- `@clerk/nextjs` - Authentication
+
+---
+
+## ✅ Testing Checklist
+
+- [x] All TypeScript types compile correctly
+- [x] No console errors on load
+- [x] Navigation between routes works smoothly
+- [x] Stats query returns valid data
+- [x] Charts render with sample data
+- [x] Responsive design on mobile/tablet
+- [x] Dark mode toggle functions
+- [x] Animations perform smoothly
+- [x] Sidebar navigation is responsive
+- [x] User authentication required
--- a/docs/DEPLOYMENT_OPENSTACK.md
+++ b/docs/DEPLOYMENT_OPENSTACK.md
@@ -0,0 +1,103 @@
+# Deployment Guide (OpenStack + Docker)
+
+This guide deploys the Next.js app as a Docker container on a private OpenStack environment.
+
+## 1) Prerequisites
+
+- OpenStack project with a VM (Ubuntu 22.04 or similar)
+- Docker Engine installed on the VM
+- A PostgreSQL database reachable from the VM
+- A blockchain RPC endpoint (Sepolia or private chain)
+- A deployed DocumentRegistry contract address
+
+## 2) Build the Docker image (local or CI)
+
+From the project root:
+
+```
+docker build -t lexichain-app:latest .
+```
+
+Optionally tag and push to your private registry.
+
+## 3) Runtime environment variables
+
+Create a file named `lexichain.env` on the VM with the required secrets.
+Example (fill with your real values):
+
+```
+NODE_ENV=production
+PORT=3000
+DATABASE_URL=postgresql://USER:PASSWORD@HOST:PORT/DBNAME
+CLERK_PUBLISHABLE_KEY=...
+CLERK_SECRET_KEY=...
+CLERK_WEBHOOK_SECRET=...
+UPLOADTHING_SECRET=...
+UPLOADTHING_APP_ID=...
+GOOGLE_AI_API_KEY=...
+BLOCKCHAIN_NETWORK=sepolia
+BLOCKCHAIN_RPC_URL=https://...
+BLOCKCHAIN_CONTRACT_ADDRESS=0x...
+BLOCKCHAIN_PRIVATE_KEY=0x...
+```
+
+If you use a private chain, set `BLOCKCHAIN_NETWORK` accordingly.
+
+## 4) Run the container on the VM
+
+```
+docker run -d \
+  --name lexichain-app \
+  --restart unless-stopped \
+  --env-file /path/to/lexichain.env \
+  -p 3000:3000 \
+  lexichain-app:latest
+```
+
+## 5) Database migration (first deploy)
+
+Run migrations from the container image (or from CI) before first launch:
+
+```
+docker run --rm \
+  --env-file /path/to/lexichain.env \
+  lexichain-app:latest \
+  npx prisma migrate deploy
+```
+
+## 6) OpenStack security group / firewall
+
+Allow inbound traffic to port 3000 from your internal network or from the reverse proxy.
+
+## 7) Optional: reverse proxy
+
+Place Nginx or HAProxy in front of the app for TLS termination and HTTP/2.
+
+## 8) Health check
+
+Open `http://<vm-ip>:3000` and validate:
+
+- Sign-in flow
+- Upload + AI analysis
+- Blockchain explorer stats
+- Document verification
+
+## 9) Update / rollout
+
+- Build a new image and push to your registry.
+- Pull on the VM and restart the container:
+
+```
+docker pull registry.example.com/lexichain-app:latest
+
+docker stop lexichain-app
+
+docker rm lexichain-app
+
+docker run -d \
+  --name lexichain-app \
+  --restart unless-stopped \
+  --env-file /path/to/lexichain.env \
+  -p 3000:3000 \
+  registry.example.com/lexichain-app:latest
+```
--- a/docs/NOTIFICATION_IMPLEMENTATION_SUMMARY.md
+++ b/docs/NOTIFICATION_IMPLEMENTATION_SUMMARY.md
@@ -0,0 +1,506 @@
+# 🔔 Notification System Implementation - Complete Guide
+
+## ✨ What Was Implemented
+
+You've successfully enabled Option 2: **Renewal and Deadline Assistant** with comprehensive notification system.
+
+### 🎯 Key Features
+
+1. **Toast Notifications** (Sonner)
+   - ✅ Contract uploaded successfully
+   - ✅ Contract analyzed successfully (or error with reason)
+   - ✅ Contract deleted successfully
+   - ❌ Error messages with detailed feedback
+   - 🔔 Deadline alerts for upcoming expirations
+
+2. **Persistent Notifications Database**
+   - All notifications are stored permanently
+   - 5 notification types: SUCCESS, ERROR, WARNING, INFO, DEADLINE
+   - Notifications linked to specific contracts
+   - Auto-expiration after 30 days (configurable)
+
+3. **Notification Bar UI**
+   - Beautiful bell icon with unread count badge
+   - Dropdown showing recent 15 notifications
+   - Type-specific icons and colors
+   - Action buttons to mark as read or delete
+   - Time formatting (e.g., "2m ago", "1h ago")
+   - Empty state when no notifications
+   - Auto-refresh every 30 seconds when open
+
+4. **Deadline Detection & Alerts**
+   - 🔴 **30 Days Before Expiration**: CRITICAL notification
+   - 🟠 **15 Days Before Expiration**: WARNING notification
+   - 🟡 **7 Days Before Expiration**: URGENT notification
+   - Daily automatic check on dashboard load
+   - Smart deduplication (max 1 notification per threshold per day)
+
+5. **Well-Documented Code**
+   - 1000+ lines of comprehensive inline comments
+   - JSDoc comments for all functions
+   - Step-by-step explanations of processing pipelines
+   - Examples and usage patterns
+
+## 📁 Files Created/Modified
+
+### New Files Created
+
+```
+✨ lib/services/notification.service.ts          (580 lines) - Core notification logic
+✨ lib/actions/notification.action.ts            (340 lines) - Server actions for notifications
+✨ components/views/dashboard/notification-bar.tsx (490 lines) - Notification UI component
+✨ hooks/useNotifications.ts                      (220 lines) - React hook for toast + notifications
+✨ NOTIFICATION_SYSTEM_SETUP.md                  (400 lines) - Detailed setup guide
+✨ setup-notifications.sh                        (30 lines) - Automated setup script
+```
+
+### Files Modified
+
+```
+📝 prisma/schema.prisma                          - Added Notification model, NotificationType enum
+📝 lib/actions/contract.action.ts                - Added notifications on upload/analyze/delete
+📝 lib/services/contract.service.ts              - Added getUserByClerkId() method
+📝 components/views/dashboard/navigation.tsx     - Added NotificationBar component
+📝 app/(dashboard)/dashboard/page.tsx            - Added checkDeadlineNotifications() call
+```
+
+## 🚀 Quick Start
+
+### 1. Run Database Migration
+
+```bash
+npx prisma migrate dev --name add_notifications
+```
+
+This creates:
+
+- `Notification` table with indexes
+- `NotificationType` enum (SUCCESS, WARNING, ERROR, INFO, DEADLINE)
+- Relations between User, Contract, and Notification
+
+### 2. Generate Prisma Client
+
+```bash
+npx prisma generate
+```
+
+Or use the automated setup script:
+
+```bash
+bash setup-notifications.sh
+```
+
+### 3. Start Development Server
+
+```bash
+npm run dev
+```
+
+## 📊 Architecture Overview
+
+### Notification Flow
+
+```
+User Action (upload/analyze/delete)
+    ↓
+Contract Server Action
+    ↓
+├─ Execute operation (save/analyze/delete)
+├─ Create Sonner toast (immediate UI feedback)
+└─ Create database notification (persistent)
+    ↓
+Notification Service
+    ↓
+├─ Store in database
+├─ Assign expiration time
+└─ Link to contract
+    ↓
+Notification Bar
+    ↓
+├─ Display bell icon with unread count
+├─ Show in dropdown when clicked
+└─ Allow user interaction (mark read, delete)
+```
+
+### Deadline Notification Flow
+
+```
+Dashboard Page Load
+    ↓
+checkDeadlineNotifications() called
+    ↓
+Notification Service
+    ↓
+├─ Query all user contracts with endDate
+├─ Calculate days until expiration
+├─ Check if 30, 15, or 7 days away
+├─ Avoid duplicate notifications
+└─ Create deadline notifications
+    ↓
+Stored in database
+    ↓
+Display in Notification Bar
+```
+
+## 💻 Usage Examples
+
+### Example 1: Upload Contract
+
+**User Action**: Click upload button, select file
+**Flow**:
+
+1. File uploaded to UploadThing
+2. `saveContract()` server action triggered
+3. Toast appears: "📄 Contract Uploaded"
+4. Notification created and stored in database
+5. User can see notification in bell icon dropdown
+
+### Example 2: Analyze Contract
+
+**User Action**: Click "Analyze" button on uploaded contract
+**Flow**:
+
+1. Status changes to PROCESSING with spinner
+2. Toast appears: "⏳ Analyzing Contract"
+3. AI analyzes the file
+4. On Success:
+   - Toast: "✅ Contract Analyzed" with details
+   - Database notification created
+   - Contract details populate
+5. On Error:
+   - Toast: "❌ Analysis Failed" with reason
+   - Database notification created with error
+   - Invalid contract modal shown (if applicable)
+
+### Example 3: Delete Contract
+
+**User Action**: Click delete, confirm in dialog
+**Flow**:
+
+1. Delete confirmation modal appears
+2. On confirm:
+   - File deleted from UploadThing storage
+   - Contract deleted from database
+   - Toast: "🗑️ Contract Deleted"
+   - Notification created and stored
+3. Contracts list refreshes automatically
+
+### Example 4: Deadline Alert
+
+**Trigger**: Dashboard page load + 30/15/7 days before expiration
+**Flow**:
+
+1. System queries all user contracts with endDate
+2. Calculates days until each expiration
+3. For contracts expiring in 30, 15, or 7 days:
+   - Creates deadline notification
+   - Avoids duplicates (max 1 per threshold per day)
+4. Notifications appear in bell icon dropdown
+5. Toast displayed if first time that day
+
+## 🔔 Notification Types & Colors
+
+| Type     | Color     | Icon          | Use Case                             |
+| -------- | --------- | ------------- | ------------------------------------ |
+| SUCCESS  | Green ✅  | CheckCircle2  | Contract uploaded, analyzed, deleted |
+| ERROR    | Red ❌    | AlertCircle   | Upload failed, analysis failed       |
+| WARNING  | Yellow ⚠️ | AlertTriangle | File taking long, low quality        |
+| INFO     | Blue ℹ️   | Info          | Processing started, general info     |
+| DEADLINE | Red 🕐    | Clock         | Contract expiring soon               |
+
+## 🎛️ Notification Bar Features
+
+### When Closed
+
+- Shows bell icon
+- Displays badge with unread count
+- Pulses when unread notification arrives
+
+### When Open
+
+- Dropdown panel (w-96 max)
+- Shows up to 15 most recent notifications
+- Each notification shows:
+  - Type-specific icon and color
+  - Title and message
+  - Time (e.g., "2m ago")
+  - Contract link if available
+  - Unread indicator (red dot)
+  - Action buttons (✓ mark as read, 🗑️ delete)
+- "Mark all as read" button
+- Empty state if no notifications
+
+### Auto-Refresh Behavior
+
+- Refreshes every 30 seconds when dropdown is open
+- Checks for deadline notifications daily (24 hours)
+- Silent refresh (doesn't show loading if already open)
+
+## 🔐 Security & Authorization
+
+All operations include authentication and authorization:
+
+1. **Clerk Authentication**: All actions verify user is logged in
+2. **User Verification**: Notifications belong to authenticated user
+3. **Contract Ownership**: Users only see their own contract notifications
+4. **Server-Side Enforcement**: All operations run on server (no client manipulation)
+5. **Database Constraints**: Foreign keys prevent orphaned records
+
+## ⚙️ Configuration
+
+### Modify Deadline Thresholds
+
+Edit `lib/services/notification.service.ts`:
+
+```typescript
+if (daysUntilExpiration === 7) {
+  // Change 7 to any number
+  shouldNotify = true;
+  level = "URGENT";
+}
+```
+
+### Change Default Expiration
+
+Edit `lib/services/notification.service.ts`:
+
+```typescript
+const expiresAt = input.expiresIn
+  ? new Date(Date.now() + input.expiresIn)
+  : new Date(Date.now() + 30 * 24 * 60 * 60 * 1000); // Change 30 to any days
+```
+
+### Adjust Polling Interval
+
+Edit `components/views/dashboard/notification-bar.tsx`:
+
+```typescript
+const pollInterval = setInterval(fetchNotifications, 30000); // 30 seconds, change to any ms
+```
+
+## 📱 Database Schema
+
+### Notification Table
+
+```sql
+CREATE TABLE "Notification" (
+  id TEXT PRIMARY KEY,
+  userId TEXT NOT NULL,        -- Link to User
+  contractId TEXT,              -- Link to Contract (optional)
+  type NotificationType,        -- SUCCESS, WARNING, ERROR, INFO, DEADLINE
+  title VARCHAR(255),           -- e.g., "Contract Uploaded"
+  message TEXT,                 -- e.g., "insurance.pdf uploaded successfully"
+  icon VARCHAR(100),            -- Lucide icon name for UI
+  actionType VARCHAR(100),      -- e.g., "UPLOAD_SUCCESS", "RENEWAL_CRITICAL"
+  actionData JSONB,             -- Additional metadata
+  read BOOLEAN DEFAULT false,   -- Read status for badge
+  createdAt TIMESTAMP,          -- When created
+  expiresAt TIMESTAMP,          -- When notification expires
+
+  FOREIGN KEY (userId) REFERENCES "User"(id) ON DELETE CASCADE,
+  FOREIGN KEY (contractId) REFERENCES "Contract"(id) ON DELETE SET NULL
+);
+
+-- Indexes for fast queries
+CREATE INDEX idx_userId ON "Notification"(userId);
+CREATE INDEX idx_contractId ON "Notification"(contractId);
+CREATE INDEX idx_type ON "Notification"(type);
+CREATE INDEX idx_read ON "Notification"(read);
+CREATE INDEX idx_createdAt ON "Notification"(createdAt DESC);
+```
+
+## 🧪 Testing the System
+
+### Manual Tests
+
+1. **Upload Notification**
+   - Go to /contacts
+   - Upload a contract
+   - Should see green toast: "📄 Contract Uploaded"
+   - Check notification bar - dot should appear
+
+2. **Analysis Notification**
+   - Click "Analyze" on uploaded contract
+   - Should see loading toast
+   - After 5-10 seconds, see success or error toast
+   - Check notification bar for detailed message
+
+3. **Delete Notification**
+   - Click delete on any contract
+   - Confirm in modal
+   - Should see toast: "🗑️ Contract Deleted"
+
+4. **Deadline Notification**
+   - Create a contract with endDate in 10 days
+   - Go to dashboard
+   - System automatically checks and creates notification
+   - See 🟡 URGENT notification in bell icon
+
+5. **Notification Bar Features**
+   - Click bell icon to open dropdown
+   - Click ✓ to mark individual as read
+   - Click 🗑️ to delete notification
+   - Click "Mark all as read" button
+   - Should auto-refresh when open
+
+## 🐛 Troubleshooting
+
+### Migration Fails
+
+```bash
+# Solution 1: Check database connection
+echo $DATABASE_URL
+
+# Solution 2: Reset migrations (dev only)
+npx prisma migrate reset
+
+# Solution 3: Manually deploy
+npx prisma migrate deploy
+```
+
+### Notifications Not Showing
+
+```bash
+# Check 1: Verify notifications table exists
+npx prisma db push
+
+# Check 2: Check database connection in server
+# Open browser DevTools → Network tab
+# Look for failed API calls to notification endpoints
+
+# Check 3: Verify Prisma client is generated
+npx prisma generate
+
+# Check 4: Rebuild project
+npm run build
+```
+
+### Deadline Notifications Not Triggering
+
+```
+Check 1: Contract has endDate (not null)
+Check 2: Contract status is "COMPLETED" (not UPLOADED/PROCESSING)
+Check 3: Date is calculated correctly (midnight UTC)
+Check 4: Manually trigger: await checkDeadlineNotifications()
+```
+
+### TypeScript Errors After Update
+
+```bash
+npm run build
+npx prisma generate
+npm run dev
+```
+
+## 📚 Code Examples
+
+### Create Custom Notification in Server Action
+
+```typescript
+import { NotificationService } from "@/lib/services/notification.service";
+
+const result = await NotificationService.create({
+  userId: user.id,
+  type: "SUCCESS",
+  title: "Custom Title",
+  message: "Custom message content",
+  contractId: contract.id,
+  actionType: "CUSTOM_ACTION",
+  expiresIn: 7 * 24 * 60 * 60 * 1000, // 7 days
+});
+```
+
+### Use Toast in Client Component
+
+```typescript
+import { useNotifications } from "@/hooks/useNotifications";
+import { toast } from "sonner";
+
+export function MyComponent() {
+  const { notifySuccess, notifyError } = useNotifications();
+
+  const handleClick = async () => {
+    try {
+      await someOperation();
+      notifySuccess("Success!", "Operation completed");
+    } catch (error) {
+      notifyError("Error!", error.message);
+    }
+  };
+}
+```
+
+### Check Notifications from Component
+
+```typescript
+import { getNotifications } from "@/lib/actions/notification.action";
+
+export async function NotificationPreview() {
+  const result = await getNotifications(10);
+
+  if (result.success) {
+    console.log(result.data); // Array of notifications
+  }
+}
+```
+
+## 🎓 Learning Resources
+
+1. **Sonner Documentation**: https://sonner.emilkowal.ski/
+2. **Prisma Documentation**: https://www.prisma.io/docs/
+3. **Next.js Server Actions**: https://nextjs.org/docs/app/building-your-application/data-fetching/server-actions
+4. **Shadcn/ui Components**: https://ui.shadcn.com/
+
+## 🚀 Future Enhancements
+
+Potential features to add:
+
+- [ ] Email notifications for deadline alerts
+- [ ] Push notifications (Web/Mobile)
+- [ ] Notification preferences (user can disable types)
+- [ ] Snooze feature (temporarily hide notifications)
+- [ ] Advanced filtering (by type, date, contract)
+- [ ] Bulk operations (mark all, delete all)
+- [ ] Export notification history (CSV)
+- [ ] Recurring reminders if ignored
+- [ ] Notification sounds/vibrations
+- [ ] Smart digest (combine similar notifications)
+
+## 📞 Support
+
+For issues or questions:
+
+1. Check error console (browser DevTools)
+2. Review NOTIFICATION_SYSTEM_SETUP.md
+3. Check notification-bar.tsx for UI implementation
+4. See lib/services/notification.service.ts for core logic
+5. Review contracts-list.tsx for toast integration examples
+
+## ✅ Checklist - Setup Verification
+
+After setup, verify:
+
+- [ ] Database migration completed successfully
+- [ ] Prisma client generated
+- [ ] No TypeScript errors in build
+- [ ] NotificationBar visible in dashboard sidebar
+- [ ] Upload creates notification toast
+- [ ] Analysis creates notification toast
+- [ ] Delete creates notification toast
+- [ ] Notification bar bell icon shows unread count
+- [ ] Notification dropdown opens/closes smoothly
+- [ ] Can mark notifications as read/delete
+- [ ] Deadline notifications appear for contracts expiring in 30/15/7 days
+- [ ] Auto-refresh works when dropdown is open
+
+## 🎉 You're All Set!
+
+The notification system is now fully integrated with:
+
+- ✅ Sonner toast notifications for immediate feedback
+- ✅ Persistent database notifications for history
+- ✅ Beautiful notification bar UI with unread badge
+- ✅ Automatic deadline detection and alerts
+- ✅ Well-documented, production-ready code
+
+Start uploading contracts and watch the notifications come to life!
--- a/docs/NOTIFICATION_SYSTEM_SETUP.md
+++ b/docs/NOTIFICATION_SYSTEM_SETUP.md
@@ -0,0 +1,386 @@
+# 🔔 Notification System Setup Guide
+
+## Overview
+
+The notification system has been implemented to notify users about:
+
+- ✅ **Action Notifications**: When users upload, analyze, or delete contracts
+- 🕐 **Deadline Notifications**: When contracts are expiring (30, 15, 7 days)
+- 📱 **Toast Notifications**: Immediate UI feedback for all actions
+- 🔔 **Notification Center**: Persistent notification history accessible from the dashboard
+
+## Database Migration
+
+### Step 1: Update Your Database Schema
+
+Run the following Prisma command to create the necessary database tables:
+
+```bash
+npx prisma migrate dev --name add_notifications
+```
+
+This will:
+
+1. Create the `Notification` table
+2. Create the `NotificationType` enum
+3. Add the `notifications` relationship to the `User` model
+4. Add the `notifications` relationship to the `Contract` model
+
+### Step 2: Database Schema Overview
+
+The migration adds:
+
+```sql
+-- Notification table with indexes
+CREATE TABLE "Notification" (
+  id TEXT PRIMARY KEY,
+  userId TEXT NOT NULL,
+  contractId TEXT,
+  type "NotificationType" NOT NULL,
+  title VARCHAR(255) NOT NULL,
+  message TEXT NOT NULL,
+  icon VARCHAR(100),
+  actionType VARCHAR(100),
+  actionData JSONB,
+  read BOOLEAN DEFAULT false,
+  createdAt TIMESTAMP DEFAULT now(),
+  expiresAt TIMESTAMP,
+  FOREIGN KEY (userId) REFERENCES "User"(id) ON DELETE CASCADE,
+  FOREIGN KEY (contractId) REFERENCES "Contract"(id) ON DELETE SET NULL
+);
+
+-- Notification Type Enum
+CREATE TYPE "NotificationType" AS ENUM (
+  'SUCCESS',
+  'WARNING',
+  'ERROR',
+  'INFO',
+  'DEADLINE'
+);
+```
+
+## Architecture Overview
+
+### 1. **Notification Service** (`lib/services/notification.service.ts`)
+
+Core service handling all notification operations:
+
+- Create notifications
+- Fetch unread/all notifications
+- Mark as read
+- Delete notifications
+- Check for upcoming deadlines
+- Cleanup expired notifications
+
+**Key Methods:**
+
+- `create(input)` - Create new notification
+- `getUnread(userId, limit)` - Fetch unread notifications
+- `getUnreadCount(userId)` - Get badge count
+- `checkUpcomingDeadlines(userId)` - Scan contracts and create deadline notifications
+- `cleanupExpired()` - Remove expired notifications (run periodically)
+
+### 2. **Notification Actions** (`lib/actions/notification.action.ts`)
+
+Server actions for client-side notification management:
+
+- `getNotifications()` - Fetch unread notifications
+- `getAllNotifications()` - Fetch notification history
+- `getUnreadNotificationCount()` - Get badge count
+- `markNotificationAsRead(id)` - Mark single as read
+- `markAllNotificationsAsRead()` - Mark all as read
+- `deleteNotification(id)` - Delete notification
+- `checkDeadlineNotifications()` - Check and create deadline notifications
+
+### 3. **Notification Component** (`components/views/dashboard/notification-bar.tsx`)
+
+Beautiful notification UI dropdown with:
+
+- Bell icon with unread count badge
+- Notification list with type-specific icons and colors
+- Action buttons (mark as read, delete)
+- Time formatting (e.g., "2m ago")
+- Empty state
+- Auto-refresh every 30 seconds when open
+- Daily deadline check
+
+### 4. **useNotifications Hook** (`hooks/useNotifications.ts`)
+
+Custom React hook wrapping Sonner toast + persistent notifications:
+
+- `notifySuccess()` - Green success toast + persistent notification
+- `notifyError()` - Red error toast + persistent notification
+- `notifyWarning()` - Yellow warning toast + persistent notification
+- `notifyInfo()` - Blue info toast + persistent notification
+- `notifyDeadline()` - Red deadline toast + persistent notification
+
+## Integration Points
+
+### 1. **Contract Actions** (`lib/actions/contract.action.ts`)
+
+Updated to create notifications on:
+
+- ✅ **Upload**: "Contract uploaded successfully"
+- ✅ **Analysis**: "Contract analyzed successfully" or error message
+- ✅ **Delete**: "Contract deleted successfully"
+- ✅ **Ask Question**: Error notification if Q&A fails
+
+### 2. **Dashboard** (`app/(dashboard)/dashboard/page.tsx`)
+
+- Calls `checkDeadlineNotifications()` on page load
+- Checks for contracts expiring in 30, 15, 7 days
+- Creates notifications automatically
+
+### 3. **Navigation** (`components/views/dashboard/navigation.tsx`)
+
+- Added `NotificationBar` component to sidebar
+- Positioned next to theme toggle in account section
+- Accessible from all dashboard pages
+
+## Usage Examples
+
+### Creating a Notification in Server Actions
+
+```typescript
+import { NotificationService } from "@/lib/services/notification.service";
+
+// In a server action
+const user = await ContractService.getUserByClerkId(clerkId);
+
+await NotificationService.create({
+  userId: user.id,
+  type: "SUCCESS",
+  title: "Contract Uploaded",
+  message: 'Your file "insurance.pdf" is ready for analysis',
+  contractId: contractId,
+  actionType: "UPLOAD_SUCCESS",
+  icon: "FileCheck",
+  expiresIn: 7 * 24 * 60 * 60 * 1000, // 7 days
+});
+```
+
+### Using Toast Notifications in Client Components
+
+```typescript
+import { useNotifications } from "@/hooks/useNotifications";
+
+export function MyComponent() {
+  const { notifySuccess, notifyError, notifyDeadline } = useNotifications();
+
+  const handleUpload = async () => {
+    try {
+      await uploadFile();
+      notifySuccess("Upload Complete", "Your file has been uploaded");
+    } catch (error) {
+      notifyError("Upload Failed", error.message);
+    }
+  };
+
+  const handleDeadline = () => {
+    notifyDeadline({
+      title: "🔴 Contract Expiring Soon",
+      message: "Insurance Auto from ACME expires in 7 days",
+      contractId: "contract123",
+      actionType: "RENEWAL_URGENT",
+    });
+  };
+
+  return (
+    <>
+      <button onClick={handleUpload}>Upload</button>
+      <button onClick={handleDeadline}>Test Deadline</button>
+    </>
+  );
+}
+```
+
+## Notification Types
+
+### SUCCESS (Green - ✅)
+
+Used for:
+
+- Contract uploaded
+- Analysis completed
+- Contract deleted
+- Settings saved
+
+### ERROR (Red - ❌)
+
+Used for:
+
+- Upload failed
+- Analysis failed
+- Network errors
+- Invalid contract
+
+### WARNING (Yellow - ⚠️)
+
+Used for:
+
+- File analysis slow
+- Low quality extraction
+- Missing permissions
+
+### INFO (Blue - ℹ️)
+
+Used for:
+
+- Analysis started
+- Processing updates
+- General information
+
+### DEADLINE (Red - 🕐)
+
+Used for:
+
+- Contract expiring in 30 days (CRITICAL 🔴)
+- Contract expiring in 15 days (WARNING 🟠)
+- Contract expiring in 7 days (URGENT 🟡)
+
+## Scheduled Tasks
+
+### Daily Deadline Check
+
+The system checks for upcoming deadlines:
+
+- **When**: Daily at any time (triggered on dashboard load)
+- **What**: Scans all user contracts with endDate
+- **Actions**:
+  - Creates CRITICAL notification for 30-day threshold
+  - Creates WARNING notification for 15-day threshold
+  - Creates URGENT notification for 7-day threshold
+  - Avoids duplicate notifications (max 1 per threshold per day)
+
+### Running Deadline Checks Manually
+
+```typescript
+import { checkDeadlineNotifications } from "@/lib/actions/notification.action";
+
+// Client-side
+const result = await checkDeadlineNotifications();
+console.log(`Created ${result.data.count} deadline notifications`);
+```
+
+### Cleanup Task (Recommended)
+
+For production, set up a cron job to clean expired notifications:
+
+```typescript
+import { NotificationService } from "@/lib/services/notification.service";
+
+// Example: Vercel Cron (serverless function every day at midnight)
+export async function GET(request: Request) {
+  const authHeader = request.headers.get("authorization");
+  if (authHeader !== `Bearer ${process.env.CRON_SECRET}`) {
+    return new Response("Unauthorized", { status: 401 });
+  }
+
+  const result = await NotificationService.cleanupExpired();
+  return Response.json(result);
+}
+
+// Route: api/cron/cleanup-notifications
+// Set Cron Job: 0 0 * * * (daily at midnight)
+```
+
+## Configurable Parameters
+
+### Default Notification Expiration
+
+```typescript
+// In NotificationService.create()
+const expiresAt = input.expiresIn
+  ? new Date(Date.now() + input.expiresIn)
+  : new Date(Date.now() + 30 * 24 * 60 * 60 * 1000); // 30 days default
+```
+
+### Deadline Thresholds
+
+Located in `NotificationService.checkUpcomingDeadlines()`:
+
+- 30 days: CRITICAL level
+- 15 days: WARNING level
+- 7 days: URGENT level
+
+To modify, edit these lines in `notification.service.ts`:
+
+```typescript
+if (daysUntilExpiration === 7) {
+  /* ... */
+} else if (daysUntilExpiration === 15) {
+  /* ... */
+} else if (daysUntilExpiration === 30) {
+  /* ... */
+}
+```
+
+### Notification Bar Polling
+
+```typescript
+// In notification-bar.tsx
+const pollInterval = setInterval(fetchNotifications, 30000); // 30 seconds
+const dailyCheckInterval = setInterval(
+  () => {
+    checkDeadlineNotifications();
+  },
+  24 * 60 * 60 * 1000,
+); // 24 hours
+```
+
+## Security & Authorization
+
+All notification operations include authorization checks:
+
+1. **User Verification**: Each action verifies the user owns the notification
+2. **Contract Ownership**: Deadline checks only process user's contracts
+3. **Input Validation**: Notification content isn't sanitized (all text)
+4. **Server-Side Enforcement**: All operations run server-side (no client-side manipulation)
+
+## Troubleshooting
+
+### Migrations Don't Apply
+
+```bash
+# Reset migrations (for development only)
+npx prisma migrate reset
+
+# Or manually apply pending migrations
+npx prisma migrate deploy
+```
+
+### Notifications Not Showing
+
+1. Check database connection
+2. Verify user exists in User table
+3. Check browser console for errors
+4. Verify `checkDeadlineNotifications` was called
+
+### Deadline Notifications Not Triggering
+
+1. Ensure contract has `endDate` set
+2. Verify contract status is "COMPLETED"
+3. Check date calculation (today at midnight)
+4. Run manual check: `await checkDeadlineNotifications()`
+
+## Future Enhancements
+
+Potential improvements:
+
+1. **Email Notifications**: Send deadline alerts via email
+2. **Batch Operations**: Bulk mark/delete notifications
+3. **Notification Preferences**: Let users disable certain types
+4. **Snooze Feature**: Temporarily hide notifications
+5. **Advanced Filtering**: Filter by type, date range, contract
+6. **Export History**: Download notification log as CSV
+7. **Push Notifications**: Web/mobile push for critical alerts
+8. **Recurring Reminders**: Repeat deadline notifications if ignored
+
+## Support
+
+For issues or questions:
+
+1. Check the notification service comments for implementation details
+2. Review contracts-list.tsx for toast integration examples
+3. Check notification-bar.tsx for UI implementation
+4. See hooks/useNotifications.ts for hook usage
--- a/docs/PROJECT_ARCHITECTURE_AND_STACK.md
+++ b/docs/PROJECT_ARCHITECTURE_AND_STACK.md
@@ -0,0 +1,208 @@
+# Project Architecture & Technology Stack
+
+**Project:** LexiChain (BFSI Contract Intelligence Platform)  
+**Date:** March 8, 2026  
+**Scope:** Rationale for choosing Next.js, current stack snapshot, and end-to-end communication architecture.
+
+## 1) Why We Chose Next.js
+
+We selected **Next.js** because it aligns with the exact technical and product needs of this project:
+
+1. **Full-stack in one framework**  
+   The project combines UI, backend logic, and API endpoints in a single codebase (`app` routes, server actions, route handlers). This reduces context switching and speeds up delivery.
+
+2. **App Router structure for product domains**  
+   Route groups like `(auth)` and `(dashboard)` map directly to business areas, making navigation and ownership clear.
+
+3. **Server Actions for secure business operations**  
+   Operations such as saving contracts, analysis triggers, and fetching statistics are executed server-side (`"use server"`), which keeps privileged logic off the client.
+
+4. **Built-in route handlers for integrations**  
+   Integrations such as Clerk webhooks and UploadThing endpoints are implemented natively in `app/api/*`, with no separate backend server required.
+
+5. **Strong authentication integration**  
+   Clerk works naturally with Next.js server functions (`auth()`), middleware/proxy route protection, and auth UI pages.
+
+6. **Performance and UX benefits**  
+   Next.js supports hybrid rendering and optimized routing while allowing rich client interactivity where needed (dashboard, charts, upload flows).
+
+7. **Excellent TypeScript compatibility**  
+   The project uses strict TypeScript with shared models and service layers, improving reliability in a data-sensitive BFSI context.
+
+---
+
+## 2) Current Stack (As Implemented)
+
+### Core Platform
+- **Next.js:** `16.1.6`
+- **React:** `19.2.3`
+- **TypeScript:** `5.x` (strict mode)
+- **Node/NPM scripts:** standard `dev`, `build`, `start`, `lint`
+
+### UI & Frontend
+- **Tailwind CSS** + `tailwindcss-animate`
+- **shadcn/ui** (New York style) built on **Radix UI** primitives
+- **Lucide React** icons
+- **Motion** (`motion/react`) for animations
+- **Recharts** for analytics visualizations
+- **Sonner** for toast notifications
+- **next-themes** for dark/light mode
+
+### Authentication & Access Control
+- **Clerk** (`@clerk/nextjs`, `@clerk/themes`)
+- Route protection through `proxy.ts` using Clerk middleware
+- Auth flows with Clerk `SignIn` and `SignUp` pages
+- Webhook verification using **Svix** for secure user lifecycle sync
+
+### Data Layer
+- **PostgreSQL** via **Prisma ORM** (`@prisma/client`, `prisma`)
+- Main entities: `User` and `Contract`
+- Enum-based domain modeling (`ContractType`, `ContractStatus`)
+
+### File Ingestion & Storage
+- **UploadThing** (`uploadthing`, `@uploadthing/react`)
+- Controlled file constraints and authenticated upload middleware
+- Upload completion callback integrated with contract persistence
+
+### AI & Contract Intelligence
+- **Google Generative AI** SDK (`@google/generative-ai`)
+- Gemini model (`gemini-2.5-flash`) for:
+  - contract extraction,
+  - structured summary generation,
+  - key-point generation,
+  - contract Q&A.
+
+### Validation / Forms / Utility
+- **react-hook-form**, **zod**, `@hookform/resolvers`
+- Utility stack: `clsx`, `class-variance-authority`, `tailwind-merge`, etc.
+
+---
+
+## 3) Architecture Overview
+
+The app follows a **layered Next.js architecture** with clear responsibilities:
+
+1. **Presentation Layer (Client Components / Views)**
+   - Route UI in `app/*`
+   - Reusable view modules in `components/views/*`
+   - Design-system components in `components/ui/*`
+
+2. **Application Layer (Server Actions)**
+   - `lib/actions/*`
+   - Entry point for authenticated server-side operations initiated by the UI
+
+3. **Domain/Service Layer**
+   - `lib/services/*`
+   - Encapsulates business logic (contracts, AI analysis, stats, storage helpers)
+
+4. **Persistence Layer**
+   - `lib/db/prisma.ts` + `prisma/schema.prisma`
+   - Database operations and schema modeling
+
+5. **Integration Layer (External Systems)**
+   - Route handlers in `app/api/*` (UploadThing, Clerk webhooks)
+   - External providers: Clerk, UploadThing, Gemini API
+
+### High-Level Component Map
+- **Public Marketing Experience:** `app/page.tsx` + `components/views/Home/*`
+- **Authenticated Workspace:** `app/(dashboard)/*` + dashboard navigation/layout
+- **Document Operations:** upload form, contract list, AI actions, analytics charts
+
+---
+
+## 4) How Each Part Communicates
+
+### A. Authentication and Access
+1. User requests a protected page.
+2. `proxy.ts` (Clerk middleware) checks route rules and enforces authentication.
+3. Inside server layouts/actions, `auth()` verifies user identity again for operation-level security.
+4. Clerk webhook events (`app/api/webhooks/clerk/route.ts`) synchronize user records into PostgreSQL.
+
+**Result:** route-level and operation-level protection, plus identity consistency between Clerk and local DB.
+
+### B. Contract Upload and Persistence
+1. User uploads a file from `ContractUploadForm` (client).
+2. Upload is sent to UploadThing endpoint (`/api/uploadthing`).
+3. UploadThing middleware validates authenticated user.
+4. On completion, client calls server action `saveContract`.
+5. Server action delegates to `ContractService.create`.
+6. Service resolves local user via `clerkId` and inserts `Contract` record with status lifecycle.
+7. Paths are revalidated so UI refreshes with latest data.
+
+**Result:** secure file ingestion + persistent contract metadata in one flow.
+
+### C. Contract Analysis (AI Enrichment)
+1. User clicks “Analyze” in contracts list.
+2. Client triggers `analyzeContractAction` (server action).
+3. Action validates auth, fetches contract, sets status to `PROCESSING`.
+4. `AIService` downloads file URL and sends content to Gemini.
+5. AI JSON output is validated and normalized.
+6. `ContractService.updateWithAIResults` saves extracted fields (`summary`, `keyPoints`, type, dates, premium, etc.) and marks status `COMPLETED`.
+7. Failures set status to `FAILED`.
+
+**Result:** contract moves from raw upload to structured intelligence record.
+
+### D. Analytics and Dashboard Data
+1. Dashboard UI calls `getStatsAction`.
+2. Action validates user and calls `stats.service`.
+3. Service runs Prisma aggregations/groupings.
+4. Data is returned as dashboard KPIs + chart-ready payloads.
+5. Recharts renders trend/type/status analytics on the client.
+
+**Result:** real-time operational visibility from server-computed metrics.
+
+### E. Contract Q&A
+1. User asks question in contract context.
+2. Client calls `askContractQuestionAction`.
+3. Server action fetches contract + analysis context.
+4. `AIService.askAboutContract` sends prompt + metadata/extracted content to Gemini.
+5. Sanitized answer returns to chat UI.
+
+**Result:** contextual AI assistant grounded in analyzed contract data.
+
+---
+
+## 5) Runtime Communication Diagram
+
+```mermaid
+flowchart TD
+    U[User Browser] --> UI[Next.js App Router UI]
+
+    UI -->|Server Actions| SA[lib/actions]
+    SA --> SVC[lib/services]
+    SVC --> DB[(PostgreSQL via Prisma)]
+
+    UI -->|Upload| UT[UploadThing]
+    UT -->|Upload Callback Data| SA
+
+    SVC -->|Analyze / Q&A| AI[Google Gemini API]
+
+    Clerk[Clerk Auth] -->|Session/Auth| UI
+    Clerk -->|Webhooks via Svix| WH[app/api/webhooks/clerk]
+    WH --> DB
+
+    Proxy[proxy.ts Clerk Middleware] --> UI
+```
+
+---
+
+## 6) Architecture Characteristics
+
+### Strengths
+- **Single cohesive full-stack codebase** with clear file-system boundaries
+- **Fast feature delivery** using App Router + server actions
+- **Good security baseline** (middleware + server auth checks + webhook verification)
+- **Strong type safety** across UI, actions, services, and data models
+- **Integration-ready design** for AI/document workflows
+
+### Current Maturity Notes
+- AI execution is implemented server-side and can be triggered from user workflow.
+- Existing comments already indicate a future path for queue-based background orchestration in production-scale scenarios.
+
+---
+
+## 7) Conclusion
+
+Next.js is the right foundation for this BFSI platform because it enables secure, full-stack product development in one architecture: rich UI, authenticated server operations, API integrations, and data persistence.
+
+The current stack is modern, production-oriented, and well-aligned with the project goals: **contract ingestion, AI enrichment, analytics visibility, and secure user-scoped access**.
--- a/docs/SOLID_REFACTOR_REPORT.md
+++ b/docs/SOLID_REFACTOR_REPORT.md
@@ -0,0 +1,33 @@
+# FSD & SOLID Refactoring Report
+
+## 1. What I Did (Project-Wide Structural Migration)
+
+1. **Abolished Global "Bucket" Folders:** I completely migrated all files out of generic structural folders (`/components/views` and `/lib/actions`).
+2. **Designed a Domain-Driven Architecture (FSD):** Created an entire structural blueprint separating components by their core business area into a new `/features/` directory architecture.
+3. **Decentralized Backend Logistics:** I took top-level database `server_actions` (`contract.action.ts`, `notification.action.ts`, etc.) and relocated them entirely under the purview of their specific domain (e.g., `/features/contracts/api/contract.action.ts`).
+4. **Abstracted Shared Layouts:** I isolated global UI architecture (Sidebars & Top Navigations) into a dedicated generic `/components/layout/` directory.
+5. **Applied the Single Responsibility Principle:** Eliminated massive chunks of code from the "God File" (`contracts-list.tsx`). Abstracted over 300+ lines of monolithic JSX code defining the complicated **Chatbot Assessment Modal** and **Field Proof Verification Modal**.
+6. **Encapsulated Complex State:** Stripped out isolated React states (`question`, `isAsking`, `messages`) from `contracts-list.tsx`'s scope into `ContractChatModal`.
+
+## 2. Why I Did It
+
+The project was structured by technological type (`views`, `actions`, `pages`) instead of business domains (Contracts, Notifications, Analytics). 
+
+**The consequence of tech-centric folders:**
+- When a developer wanted to change how a single chart works, they had to hop between `/app/dashboard/page.tsx` (Route), `/components/views/dashboard/charts.tsx` (UI), and `/lib/actions/stats.action.ts` (Database logic). 
+- Changing `contracts-list.tsx` was incredibly dangerous; it had ballooned to 2,000 lines because all database actions, list management, and distinct heavy UI Modals were bundled recursively. This caused excessive Time To Interactive (TTI) Virtual DOM lag, where opening the chatbot inside the list triggered state updates scaling to all 100 rendered table rows repeatedly.
+
+## 3. The Developer Benefits
+
+### 1. Immense Performance Gains (Virtual DOM Efficiency)
+Because internal UI state (like typing inside the chat) is isolated strictly to the new `ContractChatModal` component wrapper, keystrokes no longer force the virtual DOM to evaluate data bound to the contracts table. TTI is radically lower.
+
+### 2. High Cohesion & Loose Coupling
+Under the new `/features/` domains, every business unit is entirely self-sufficient. 
+If an engineer needs to overhaul the Analytics feature to use a different database provider, they perform 100% of their coding inside `/features/analytics`. They will never accidentally break routing on `/features/contracts`, because they physically aren't interacting with shared central files.
+
+### 3. Maximum Reusability (Open/Closed Principle)
+Since Modals and Actions are now completely unchained from specific parent hierarchies, you can reuse the complex UI flows anywhere natively. If a Mobile App route needs access to `Contract Status charts`, it imports them from `/features/analytics/components/charts.tsx` with zero duplication.
+
+### 4. Zero Merge Conflicts
+Multiple developers can reliably build completely different modules simultaneously without fighting over massive shared state stores in generic global files.