feat: système de tags + vue table enrichie pour recherche/filtre workspace

- DB: tables tags + page_tags avec index
- API: CRUD tags (GET/POST/DELETE items/{id}/tags, GET /tags, GET /tags/search)
- Tree endpoint enrichi: size, dates, author, tags par nœud
- Table enrichie: colonnes Name, Path, Size, Modified, Type, Author, Tags
- Tag chips avec compteurs + filtrage par clic
- Ajout/retrait tags inline dans la table
- Filtre Folders + auto-switch table quand recherche active

app/db.py

@@ -123,8 +123,8 @@ def init_db():
                 project_owner TEXT NOT NULL,
                 project_name TEXT NOT NULL,
                 name TEXT NOT NULL,
-                prop_type TEXT NOT NULL DEFAULT 'select',  -- select, multi_select, date, person, text
-                options_json TEXT DEFAULT '[]',             -- for select/multi_select
+                prop_type TEXT NOT NULL DEFAULT 'select',
+                options_json TEXT DEFAULT '[]',
                 position INTEGER NOT NULL DEFAULT 0,
                 created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                 UNIQUE(project_owner, project_name, name)
@@ -293,6 +293,23 @@ def init_db():
                 content_json TEXT DEFAULT '[]',
                 created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
             );
+
+            -- v2.2.0: Tags system
+            CREATE TABLE IF NOT EXISTS tags (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                name TEXT NOT NULL UNIQUE,
+                color TEXT DEFAULT '#787774',
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+            );
+
+            CREATE TABLE IF NOT EXISTS page_tags (
+                page_id INTEGER NOT NULL REFERENCES pages(id) ON DELETE CASCADE,
+                tag_id INTEGER NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                PRIMARY KEY (page_id, tag_id)
+            );
+            CREATE INDEX IF NOT EXISTS idx_pt_page ON page_tags(page_id);
+            CREATE INDEX IF NOT EXISTS idx_pt_tag ON page_tags(tag_id);
         """)
         # Migration: add parent_id if missing (v1.0.0+)
         try: