Tighten gitignore, clarify ollama_web_search, add image deps installer

- Add per-user session/workspace paths to .gitignore so runtime data
  (sessions, uploads, memory, attachments, pubmed) is no longer tracked
- Narrow ollama_web_search description to prevent it being chosen over
  web_search for news/info queries — it's now explicitly a fallback only
- Add scripts/install-image-deps.sh to install Pillow/torch/rembg deps
- Remove stray root files (1, pdf-pptx.txt, eng.traineddata)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -52,10 +52,28 @@
 .smallclaw/workspace_state.json
 .smallclaw/.migrated-from-localclaw
 
-# --- WORKSPACE RUNTIME FILES ---
+# --- PER-USER RUNTIME DATA ---
+# Sessions, workspace runtime files, uploads are all user-specific runtime data.
+# Keep: prompts/AGENTS.md, prompts/TOOLS.md, workspace/SOUL.md etc. (static templates)
+.smallclaw/users/*/sessions/
+.smallclaw/users/*/workspace/memory/
+.smallclaw/users/*/workspace/uploads/
+.smallclaw/users/*/workspace/attachments/
+.smallclaw/users/*/workspace/pubmed/
+.smallclaw/users/*/workspace/tool_audit.log
+.smallclaw/users/*/workspace/HEARTBEAT.md
+.smallclaw/users/*/workspace/note.txt
+.smallclaw/users/*/workspace/*.html
+.smallclaw/users/*/workspace/*.js
+.smallclaw/users/*/workspace/*.css
+.smallclaw/users/*/workspace/*.py
+.smallclaw/users/*/workspace/*.sh
+.smallclaw/users/*/workspace/*.bat
+.smallclaw/users/*/workspace/*.txt
+
+# --- ROOT WORKSPACE RUNTIME FILES ---
 # Keep: SOUL.md, SELF.md, IDENTITY.md, USER.md, MEMORY.md, AGENTS.md, TOOLS.md, BOOT.md, README.md
 # These are default templates that ship with SmallClaw — new users need them.
-# Ignore: daily memory logs, tool audit log, heartbeat, and any AI-generated scratch files.
 workspace/memory/
 workspace/tool_audit.log
 workspace/HEARTBEAT.md