fix(agent-chat): streaming state leak, document parser magic bytes, HITL flow

### Bugfixes — Agent Chat 'Думаю' State Leak
- fix(agent-chat): loadHistory() now resets streamingState/idle + cancels stale
  submission — prevents 'Думаю' state leak across conversation switches
- fix(agent-chat): onDisconnected/onDisconnectedPermanent cascade to
  streamingState — prevents permanent hang on connection loss during stream
- fix(agent-chat):  guard on isLoadingHistory — prevents false commit
  of 'agent unavailable' fallback when switching conversations
- fix(agent-chat): remove race in _sendNow empty-response check vs Svelte
   microtask (duplicate logic removed,  handles correctly)
- fix(stream-processor): confirm_resolved now appends msg.text to partialText
  instead of dropping it

### Bugfixes — Backend PDF Upload
- fix(document-parser): _detect_format_by_magic() — reads file header magic
  bytes as fallback when Gradio loses filename
- fix(document-parser): improved name extraction — tries orig_name, path stem
- fix(document-parser): @RELATION AgentChatTypes -> AgentChat.Types

### HITL Flow & Agent Chat Improvements
- feat(agent): HITL resume confirm/deny with userId/userJwt/envId propagation
- feat(agent): confirm_required metadata fallback via aget_state() after
  'Event loop is closed' error during interrupt
- feat(agent): interrupt_before re-enabled via AGENT_CONFIRM_TOOLS env var
- feat(frontend): debug panel with connection/stream state monitoring
- feat(frontend): AgentChatModel constructor options + onBeforeSend callback
- feat(frontend): crypto.randomUUID() for local conversation ID on first send

### Backend Agent Refactoring
- refactor(agent): langgraph_setup — monkey-patch for PydanticSerializationError
- refactor(agent): tools.py — dual identity headers, expanded tool set
- refactor(agent): run.py — _find_free_port, Gradio server port fallback
- refactor(agent): app.py — file size validation, message truncation, HITL path

### Frontend
- feat(dashboard-hub): DashboardHubModel with filters, pagination, git actions
- feat(ui): DateRangeFilter component
- feat(i18n): new dashboard keys; cache tooltips fix
- fix(i18n): full run tooltips — cache is NOT ignored

### Semantic Protocol
- chore(agents): update all agents with canonical format
- chore(skills): sync semantics-core, semantics-contracts, molecular-cot-logging

### Housekeeping
- chore: remove stale semantic reports (10 files, Jan 2026)
- chore: update 033-gradio-agent-chat specs, contracts, UX, tasks, tests
- chore: add .agents/ directory (mirrors .opencode/ agent layouts)
- chore: update run.sh with DEV_MODE, port management

.opencode/agents/reflection-agent.md

@@ -72,15 +72,14 @@ You must reject polluted handoff that contains long failed reasoning transcripts
 - Do not generate broad architectural rewrites when a narrower environment, dependency, contract, or harness explanation fits the evidence.
 
 ## Axiom MCP Tools
-See `semantics-core` §VI for the canonical tool reference. For diagnosis:
-- `axiom_semantic_discovery search_contracts` — verify contract existence, type, complexity
-- `axiom_semantic_context local_context` — full context: code + @RELATION dependencies
-- `axiom_semantic_validation audit_contracts` — structural violations (wrong tier, missing metadata)
-- `axiom_semantic_validation impact_analysis` — upstream/downstream who calls/who is affected
-- `axiom_contract_metadata` — check contract metadata (@PRE, @POST, @RATIONALE)
-- `axiom_semantic_context workspace_health` — orphans, unresolved relations, C1-C5 distribution
+See `semantics-core` §VI for the canonical tool reference. Axiom MCP exposes 2 tools (`search` and `audit`). For diagnosis:
+- `search` tool with `operation="search_contracts"` — verify contract existence, type, complexity
+- `search` tool with `operation="local_context"` — full context: code + @RELATION dependencies
+- `audit` tool with `operation="audit_contracts"` — structural violations (wrong tier, missing metadata)
+- `audit` tool with `operation="impact_analysis"` — upstream/downstream who calls/who is affected
+- `search` tool with `operation="status"` — DuckDB index stats (contract count, edges, active generation)
 
-Все инструменты работают через DuckDB-индекс (актуальные цифры — запроси `axiom_semantic_index status`) — это твой семантический граф для диагностики.
+Все операции read-only и работают через DuckDB-индекс — это твой семантический граф для диагностики.
 
 ---