Add standalone debug page at /debug ...

Replaces the old_webclient/debug.html with a proper self-contained
tool at debug/index.html. New features over the old page:
- Sidebar session list with profile, message count, pin indicator
- Auto-refresh toggle (3s interval)
- Refresh button
- Renders thinking blocks, is_plan and is_summary tags
- Shows tool call name on tool result messages
- Clickable image thumbnails (open full-size)
- All new fields from the current LLM context API

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

Handle heartbeat and session_sync on WS reconnect ...

- Ignore heartbeat events (server keep-alive pings)
- On session_sync after a reconnect: call reloadSession() to fetch
  the latest saved history so the user sees the response even if
  the agent finished while the client was disconnected
- Add chat.reloadSession(): force-reloads session from API bypassing
  the same-id guard, also restores context token metrics

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

Fix WS disconnect and missed stream on reconnect ...

Two related problems:
- During long AIHelper calls (non-streaming LLM), no data flows to the
  WebSocket and browsers drop the connection after ~30-60s of inactivity.
  Fixed with a 20s heartbeat: _stream_to_client now uses asyncio.wait_for
  and sends {"type":"heartbeat"} on timeout to keep the connection alive.

- After reconnect, if the agent finished while the client was offline,
  _runs no longer holds the session and no stream_start is sent. Client
  would reconnect silently with no response shown. Fixed by sending
  {"type":"session_sync"} on every new WS connection (after reattach
  completes or immediately when no run is active) so the client knows
  to reload session history.

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

Count AIHelper tokens in session metrics ...

Adds prompt/completion token fields to LLMResponse, populated by
OllamaBackend.complete(). AIHelper emits AIHelperTokensUsed into the
current event sink after each LLM call; run_stream drains it into
_subagent_tokens so AIHelper usage is reflected in the turn token delta.

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

Improve filesystem tool description: prioritize AI actions with examples ...

- Description now opens with explicit ALWAYS PREFER rule for query/smart_edit
- Each AI action has concrete examples (function lookup, renaming, config search)
- Standard actions demoted to 'use only when AI not applicable'
- question/instruction parameters include examples so the model understands
  the full range of applicable cases

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

Add AIHelper + filesystem query/smart_edit AI actions ...

AIHelper (navi/core/ai_helper.py):
- Reusable LLM utility for AI-enhanced tools: ask() and ask_json()
- Reads current_model ContextVar (set per-turn) so tools always use
  the session's active model without extra wiring
- Robust JSON extraction: strips markdown fences, bracket-matching fallback

current_model ContextVar (navi/tools/base.py):
- New ContextVar set by run_stream() and run_ephemeral() after profile
  is resolved; AIHelper reads it to pick the right model automatically

filesystem query action:
- Natural language question about any file, chunked at ~20k tokens of
  content (~80k chars) with 30-line overlap between chunks
- Single-chunk: one LLM call; multi-chunk: partial answers accumulated
  then synthesized in a final call

filesystem smart_edit action:
- Natural language edit instruction on files up to ~200k chars
- LLM outputs JSON patch ops: replace / delete / insert (1-based lines)
- Ops validated then applied bottom-up to preserve line numbers
- Returns unified diff of changes; preserves trailing newline

registry: AIHelper created once, OllamaBackend reused (no double init),
FilesystemTool receives ai_helper at construction

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

Make profile switching autonomous: switch immediately, inform after ...

Previously Navi asked for permission before switching profiles.
Updated both the injected profiles block in the system prompt and the
switch_profile tool description to explicitly say: switch on your own
judgment, do not ask, then inform the user which profile is active and why.

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

Add profile discoverability: list_profiles tool + system prompt injection ...

- AgentProfile: new short_description (1-line) and full_description (dict
  with specialization / when_to_use / key_tools) fields
- All 3 profile configs: structured descriptions added; list_profiles added
  to enabled_tools
- _build_system_prompt: now accepts full AgentProfile; injects compact
  "Available profiles" block into every system prompt so Navi always knows
  what other profiles exist and when to switch — dynamically, no hardcoding
- ListProfilesTool: new built-in; returns structured per-profile details
  (specialization, when_to_use, key_tools); accepts optional profile_id
  for single-profile lookup
- registry: register list_profiles_tool after profiles registry is built

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

Fix UnicodeEncodeError for Cyrillic in email headers ...

_enc_header() checks if a value is ASCII-safe; if not, wraps it in
email.header.Header with utf-8 charset, producing RFC 2047 encoding
(=?utf-8?b?...?=). Applied to Subject and To in _build_mime — covers
both send and reply with Cyrillic subjects or display names.

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

Fix gmail auth: read credentials from settings, not os.environ ...

pydantic-settings loads .env only into the Settings object — it does not
populate os.environ. Added gmail_address and gmail_app_password fields to
Settings; gmail tool now reads from settings instead of os.environ.

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

Add gmail tool manual ...

Concise reference covering all 5 actions, IMAP query syntax table,
UID concept, HTML body requirement, and typical workflow.

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

Rewrite Gmail tool: IMAP/SMTP + App Password (drop OAuth2) ...

Standard library only (imaplib, smtplib) — no google-api dependencies.
Auth via GMAIL_ADDRESS + GMAIL_APP_PASSWORD env vars.
Pagination via integer offset instead of page token.
Message IDs are IMAP UIDs (shown in list output).
html2text still used for HTML→plain conversion on read.

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

Add Gmail tool: send, list, list_unread, read, reply via Gmail API ...

- tools/gmail.py: single tool with 'action' param routing to 5 operations.
  Prefers text/plain MIME part; converts HTML→text via html2text for
  HTML-only emails. Truncates body at 5000 chars. Marks message read on
  'read'. Reply preserves thread via threadId + In-Reply-To/References headers.
  Outgoing emails sent as multipart/alternative (plain + html).
- tools/gmail_auth.py: one-time OAuth2 setup script (InstalledAppFlow).
  Reads gmail_credentials.json, saves token to gmail_token.json.
- tools/enabled.json: add gmail to global tool list
- Dependencies: google-api-python-client, google-auth-oauthlib, html2text

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

Persist context token count: return from API, restore on session load ...

- GET /sessions/{id} now returns context_token_count and max_context_tokens
  (max pulled from settings.ollama_num_ctx)
- loadSession() in chat store sets contextTokens/maxContextTokens from the
  response so ContextBar shows the last known fill level immediately on load,
  not only after the first new message
- Restore v-if guard on ContextBar (hides for brand-new sessions with 0 tokens)

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

Fix metrics: net token delta, subagent aggregation, ContextBar always visible ...

- run_stream: track _prev_tokens baseline before turn loop; compute net
  token cost as (context_tokens - prev) + subagent_tokens for per-message cost
- run_stream: intercept SubagentComplete in sink drain loop to accumulate
  subagent token and tool-call counts into the parent turn's totals
- run_ephemeral: already emitting SubagentComplete (from prior session)
- msg-meta-row: remove margin-left:auto from .msg-meta-time so time
  groups inline with elapsed/tools/tokens instead of floating right
- ContextBar: remove v-if guard so bar is always visible (not only after
  first LLM response with token data)

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

Add response metrics: elapsed time, tool calls, token count ...

Server:
- Message model: elapsed_seconds, tool_call_count, token_count fields
  (display-only, excluded from LLM context via exclude_none)
- StreamEnd event: carries same three fields
- agent.run_stream: tracks turn start time, counts ToolEvent completions,
  writes metrics onto the final assistant Message before saving to DB
- WebSocket: forwards metrics in stream_end payload

Client:
- chat.onStreamEnd: attaches elapsed_seconds, tool_call_count, token_count
  to the streaming message on completion
- buildMessageList: scans each assistant group for metrics from history
- AssistantMessage: renders .msg-meta-row below the response —
  timer icon + Xs · wrench icon + N tools · coins icon + Nk tokens · time
  (each item only shown if present; time pushed right via margin-left: auto)

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

webclient: UI density improvements for session names and header ...

Sidebar:
- session-name: 12px → 13px (more prominent with real names)
- session-preview: 13px → 12px, clamp 2 → 3 lines (more content visible)
- session-actions buttons: 26×26px, gap 2px (narrower, more room for info)

Chat header (mobile):
- chat-header-info: column layout on mobile so title and profile badge
  stack vertically (flex-direction: column; align-items: flex-start)

ContextBar:
- Recomposed to single row: [track] [pct%]
- Track 100px → 60px, height 5px → 4px
- Full token counts moved to title attribute (hover tooltip)

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

Add session name generation via LLM ...

Backend:
- Session model gets name: str | None field
- SQLite migration: ADD COLUMN name TEXT
- PostgreSQL: ADD COLUMN IF NOT EXISTS name TEXT (applied on pool init)
- SessionStore: add set_name() abstract method, implemented in all stores
- navi/core/name_generator.py: LLM worker that reads user messages and
  returns a 3–6 word title or None if content isn't substantial yet
- POST /sessions/{id}/generate-name endpoint: fires LLM, saves and
  returns name; skips if session already named or has no user messages
- GET /sessions and GET /sessions/{id} now include name field

Client:
- api.generateSessionName(id) — calls the new endpoint
- sessions store: updateName(id, name) mutation
- chat store: after stream_end, _tryGenerateName() runs fire-and-forget;
  skips silently if session already has a name or if request fails
- SessionItem already displays session.name (falls back to id prefix)

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

webclient: remove 'Planning' label from wait indicator; add scroll-to-bottom button ...

- Waiting indicator now shows only a spinner (text was misleading — model
  doesn't always plan before responding)
- Add floating scroll-to-bottom button that appears when scrolled >200px
  from bottom, disappears when near bottom; smooth fade+slide transition;
  positioned bottom-right (under thumb on mobile)

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

webclient: reduce message-list horizontal padding to 10px on mobile ...

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

webclient: remove horizontal padding on message-list-inner for mobile ...

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

webclient: wrap markdown tables in scrollable container for mobile ...

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

webclient: fix history scroll by hiding content until positioned ...

Hide message-list-inner (opacity: 0) before scrolling to bottom,
then reveal it — so the user never sees the jump from top to bottom
on page reload or session switch. Content fades in already at the
correct scroll position.

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

webclient: message timestamps, confirm dialog, layout and UX fixes ...

- Add useTime.js: relative time labels ("just now", "5m ago", HH:MM) with auto-refresh every 30s
- Show message timestamps below user bubbles and assistant replies
- Show session last_active time in sidebar below preview
- Add ConfirmDialog.vue + useConfirm.js: kit-styled modal confirm, wired to delete in SessionItem
- SessionList: switch RecycleScroller → DynamicScroller to support variable item heights
- SessionItem: remove fixed 74px height; show action buttons always on touch devices (hover: none)
- MessageList: constrain content to max-width 920px centered (message-list-inner, input-row)
- MessageList: replace TransitionGroup with plain v-for; animate only new messages via .msg-enter CSS class, history loads silently without scroll animation

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

Fix scroll-to-bottom after page reload ...

Watch chat.loading instead of currentId for post-load scroll.
nextTick + rAF ensures browser layout is settled before scrolling.

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

ThinkingCard: add chevron, open by default; plan loading indicator ...

- ThinkingCard: add ph-caret-down chevron (matches plan/tool card style),
  open by default (removed auto-close on thinking_end)
- AssistantMessage: show "Planning…" spinner when streaming but no content
  yet — gives feedback during the two-LLM-call planning phase
- app.scss: thinking-chevron styles, planning-indicator styles

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

Migrate to Vue webclient; rename old client to old_webclient ...

- client/ → old_webclient/ (vanilla JS client preserved as reference)
- webclient/ — new Vue 3 + Pinia webclient (source + dist build)
- vite.config.js: outDir changed to webclient/dist/
- main.py: serve /assets and /images from webclient/dist/,
  index.html from webclient/dist/index.html
- .gitignore: exclude webclient/node_modules/, include webclient/dist/

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

Restore vanilla JS client/index.html ...

Accidentally replaced with Vue app shell in a previous commit.

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

Persist thinking and plan cards across session reloads ...

- Message: add thinking and is_plan fields (display-only, not sent to LLM)
- Agent main loop: accumulate thinking per iteration, save with assistant message
- _run_planning: also append plan to session.messages with is_plan=True so UI
  can render plan cards after page reload (context already had the plan)

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

Fix Ollama connection leak and empty message bug in agent ...

- _iter_stream_guarded: track chunk_task as nullable, cancel in finally
  block to prevent zombie HTTP connections accumulating under load
- Final turn: use `content or None` so empty text isn't saved to DB
- client/index.html: point to new Vue webclient build
- profiles: add email_manager tool

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