feat(registratura): detail sheet side panel + configurable column visibility

- New registry-entry-detail.tsx: full entry visualization in Sheet (side panel)
  - Status badges, document info, parties, dates, thread links
  - Attachment preview: images inline, NAS paths with IP fallback
  - Legal deadlines, external tracking, tags, notes sections
  - Action buttons: Editează, Închide, Șterge
- Registry table rewrite:
  - 10 column defs with Romanian tooltip explanations on each header
  - Column visibility dropdown (Settings icon) with checkboxes
  - Default: Nr/Data/Dir/Subiect/Exped./Dest./Status (7/10)
  - Persisted in localStorage (registratura:visible-columns)
  - Row click opens detail sheet, actions reduced to Eye + Pencil
- Docs updated: CLAUDE.md, ROADMAP.md (3.03c), SESSION-LOG.md

SESSION-LOG.md

@@ -20,14 +20,39 @@ Continuation of QA improvements. NAS path enhancement: all 4 drives + DNS→IP f
   - Badge now shows share label (Proiecte/Arhiva/Organizare/Transfer) instead of generic "NAS"
   - Validation hint updated to show all 4 drive letters
 
+- **Registratura — Entry Detail Sheet (Side Panel):**
+  - New `registry-entry-detail.tsx` component (~500 lines)
+  - Side panel (Sheet) slides in from the right on Eye icon click or row click
+  - Full entry visualization: status badges, document info, parties, dates, thread links, legal deadlines, attachments with inline image preview, NAS path links with IP fallback, external tracking, tags, notes
+  - Action buttons inside sheet: Edită, Închide, Șterge
+  - Attachment preview: images display inline, files show download button, NAS paths show full UNC + short display + copy + IP fallback
+
+- **Registratura — Column Visibility Manager:**
+  - Configurable columns via Settings dropdown in table header
+  - 10 columns defined with Romanian tooltips explaining each abbreviation
+  - Default visible: Nr., Data, Dir., Subiect, Exped., Dest., Status (7/10)
+  - Hidden by default: Tip, Resp., Termen (can be toggled on)
+  - Persisted in localStorage per user (`registratura:visible-columns`)
+  - Reset button restores defaults
+
+- **Registratura — Table UX Cleanup:**
+  - Row click opens detail sheet (cursor-pointer)
+  - Actions reduced from 3 buttons (close/edit/delete) to 2 (view/edit)
+  - Close and Delete moved into detail sheet
+  - Column headers have tooltips explaining naming convention
+  - Attachment/thread/deadline indicators compacted in Subject column
+
 - **Documentation updated:**
-  - CLAUDE.md: Registratura v0.3.0, NAS drives in module table, NAS row in integrations table
-  - ROADMAP.md: Registratura version bump, new task 3.03b with full feature list
+  - CLAUDE.md: Registratura v0.3.0 updated description
+  - ROADMAP.md: New task 3.03c with detail sheet + column manager features
   - SESSION-LOG.md: This session entry
 
 ### Files Changed
 
+- **New:** `src/modules/registratura/components/registry-entry-detail.tsx`
 - **Modified:** `src/config/nas-paths.ts` (4 drives, IP fallback helpers, shareLabelFor)
+- **Modified:** `src/modules/registratura/components/registry-table.tsx` (column visibility, tooltips, view button, row click)
+- **Modified:** `src/modules/registratura/components/registratura-module.tsx` (detail sheet integration, handleView)
 - **Modified:** `src/modules/registratura/components/registry-entry-form.tsx` (IP fallback link, share badge, validation hints)
 - **Modified:** `CLAUDE.md`, `ROADMAP.md`, `SESSION-LOG.md`