feat: implement session rename with SQLite storage (#413)

* feat: implement session rename with SQLite storage (closes #72, fixes #358)

- Add session_names table to store custom display names per provider
- Add PUT /api/sessions/:sessionId/rename endpoint
- Replace stub updateSessionSummary with real API call
- Apply custom names across all providers (Claude, Codex, Cursor)
- Fix project rename destroying config (spread merge instead of overwrite)
- Thread provider parameter through sidebar component chain
- Add i18n error messages for rename failures (en, ja, ko, zh-CN)

* fix: address CodeRabbit review feedback for session rename

- Log migration errors instead of swallowing them silently (db.js)
- Add try/catch to applyCustomSessionNames to prevent getProjects abort
- Move applyCustomSessionNames to db.js as shared helper (DRY)
- Fix Cursor getSessionName to check session.summary for custom names
- Move edit state clearing to finally block in updateSessionSummary
- Sanitize sessionId, add 500-char summary limit, validate provider whitelist
- Remove dead applyCustomSessionNames call on empty manual project sessions

* fix: reject sessionId on mismatch instead of silent normalization

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* fix: enable rename for all providers, add Gemini support, clean up orphans

- Enable rename UI (pencil icon) for Codex, Cursor, and Gemini sessions
- Keep delete button hidden for Cursor (no backend delete endpoint)
- Add 'gemini' to VALID_PROVIDERS and hoist to module scope
- Add sessionNamesDb.deleteName on session delete (claude, codex, gemini)
- Fix token-usage endpoint sessionId mismatch validation
- Remove redundant try/catch in sessionNamesDb methods
- Let session_names migration errors propagate to outer handler

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: Haileyesus <118998054+blackmammoth@users.noreply.github.com>

server/projects.js

@@ -66,6 +66,7 @@ import sqlite3 from 'sqlite3';
 import { open } from 'sqlite';
 import os from 'os';
 import sessionManager from './sessionManager.js';
+import { applyCustomSessionNames } from './database/db.js';
 
 // Import TaskMaster detection functions
 async function detectTaskMasterFolder(projectPath) {
@@ -458,6 +459,7 @@ async function getProjects(progressCallback = null) {
           total: 0
         };
       }
+      applyCustomSessionNames(project.sessions, 'claude');
 
       // Also fetch Cursor sessions for this project
       try {
@@ -466,6 +468,7 @@ async function getProjects(progressCallback = null) {
         console.warn(`Could not load Cursor sessions for project ${entry.name}:`, e.message);
         project.cursorSessions = [];
       }
+      applyCustomSessionNames(project.cursorSessions, 'cursor');
 
       // Also fetch Codex sessions for this project
       try {
@@ -476,6 +479,7 @@ async function getProjects(progressCallback = null) {
         console.warn(`Could not load Codex sessions for project ${entry.name}:`, e.message);
         project.codexSessions = [];
       }
+      applyCustomSessionNames(project.codexSessions, 'codex');
 
       // Also fetch Gemini sessions for this project
       try {
@@ -484,6 +488,7 @@ async function getProjects(progressCallback = null) {
         console.warn(`Could not load Gemini sessions for project ${entry.name}:`, e.message);
         project.geminiSessions = [];
       }
+      applyCustomSessionNames(project.geminiSessions, 'gemini');
 
       // Add TaskMaster detection
       try {
@@ -567,6 +572,7 @@ async function getProjects(progressCallback = null) {
       } catch (e) {
         console.warn(`Could not load Cursor sessions for manual project ${projectName}:`, e.message);
       }
+      applyCustomSessionNames(project.cursorSessions, 'cursor');
 
       // Try to fetch Codex sessions for manual projects too
       try {
@@ -576,6 +582,7 @@ async function getProjects(progressCallback = null) {
       } catch (e) {
         console.warn(`Could not load Codex sessions for manual project ${projectName}:`, e.message);
       }
+      applyCustomSessionNames(project.codexSessions, 'codex');
 
       // Try to fetch Gemini sessions for manual projects too
       try {
@@ -583,6 +590,7 @@ async function getProjects(progressCallback = null) {
       } catch (e) {
         console.warn(`Could not load Gemini sessions for manual project ${projectName}:`, e.message);
       }
+      applyCustomSessionNames(project.geminiSessions, 'gemini');
 
       // Add TaskMaster detection for manual projects
       try {
@@ -1071,10 +1079,13 @@ async function renameProject(projectName, newDisplayName) {
 
   if (!newDisplayName || newDisplayName.trim() === '') {
     // Remove custom name if empty, will fall back to auto-generated
-    delete config[projectName];
+    if (config[projectName]) {
+      delete config[projectName].displayName;
+    }
   } else {
-    // Set custom display name
+    // Set custom display name, preserving other properties (manuallyAdded, originalPath)
     config[projectName] = {
+      ...config[projectName],
       displayName: newDisplayName.trim()
     };
   }