refactor: migrate to data-studio-agent v0.1.1 shared library

[Blankll]

What

Complete the migration of dockit from a self-contained agent implementation to the shared data-studio-agent library (v0.1.1).

Before vs After

flowchart LR
  subgraph Before["Before (self-contained)"]
    direction TB
    D1["dockit/src-tauri/src/agent/"]
    D1a["chat_formatter/"] --- D1b["compact.rs"]
    D1b --- D1c["loop_runner.rs"]
    D1c --- D1d["harness.rs"]
    D1d --- D1e["model_registry.rs"]
    D1e --- D1f["provider_adapter.rs"]
    D1f --- D1g["token_counter.rs"]
    D1g --- D1h["tool_executor.rs"]
    D1h --- D1i["tools.rs"]
    D1i --- D1j["conversation.rs"]
    D1j --- D1k["loop_runner_support.rs"]
    D1k --- D1l["config.rs"]
    
    D2["capabilities/"] --- D3["capability handlers"]
    D1 --- D2
  end

  subgraph After["After (shared lib)"]
    direction TB
    L1["data-studio-agent (v0.1.1)\n─ 15 modules, 6500+ lines ─"]
    L1a["chat_formatter/"] --- L1b["compact.rs"]
    L1b --- L1c["loop_runner.rs"]
    L1c --- L1d["harness.rs"]
    L1d --- L1e["model_registry.rs"]
    L1e --- L1f["provider_adapter.rs"]
    L1f --- L1g["token_counter.rs"]
    L1g --- L1h["traits.rs"]
    L1h --- L1i["storage/"]

    A1["dockit/src-tauri/src/\n(thin adapters only)"]
    A1a["agent_adapters.rs\n← Tauri wrappers → lib"] --- A1b["agent/executor.rs\n← ToolExecutor impl"]
    A1b --- A1c["agent/session_store.rs\n← app-specific CRUD"]
    A1c --- A1d["capabilities/\n← tool handlers"]
    A1d --- A1e["agent/query_history.rs\n← app-specific"]
    
    L1 -.->|"git tag v0.1.1"| A1
  end

  Before --> After

  style Before fill:#fff3e0,stroke:#e65100
  style After fill:#e8f5e9,stroke:#2e7d32
  style D1 fill:#ffcc80,stroke:#e65100
  style L1 fill:#a5d6a7,stroke:#2e7d32
  style A1 fill:#c8e6c9,stroke:#2e7d32

Loading

Changes

Deleted (14 files, -4094 lines)

All agent modules extracted to the shared library:
chat_formatter/, compact.rs, conversation.rs, harness.rs, loop_runner.rs, loop_runner_support.rs, model_registry.rs, provider_adapter.rs, token_counter.rs, tool_executor.rs, tools.rs, config.rs

Added

• agent_adapters.rs — Tauri command wrappers that create SqliteSessionStore + TauriEmitter and delegate to shared lib

Modified

• agent/executor.rs — implements ToolExecutor trait from lib
• agent/session_store.rs — app-specific session CRUD (no duplication with lib)
• capabilities/* — add parallel_ok field, fix test constructors
• lib.rs — wire up Tauri commands via agent_adapters
• Cargo.toml — data-studio-agent = { git, tag = "v0.1.1" }

Verification

• ✅ cargo build — green
• ✅ cargo test — green
• ✅ No dead code or duplication remaining in agent/ directory

[codecov]

Codecov Report

❌ Patch coverage is 6.80628% with 178 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.74%. Comparing base (e3f2bab) to head (bc32281).

Files with missing lines	Patch %	Lines
src-tauri/src/agent_adapters.rs	0.00%	170 Missing ⚠️
src-tauri/src/lib.rs	0.00%	6 Missing ⚠️
src-tauri/src/agent/session_store.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #460      +/-   ##
==========================================
+ Coverage   42.69%   46.74%   +4.04%     
==========================================
  Files         117      106      -11     
  Lines       16050    13158    -2892     
  Branches      768      768              
==========================================
- Hits         6853     6151     -702     
+ Misses       8958     6768    -2190     
  Partials      239      239              

Files with missing lines	Coverage Δ
src-tauri/src/agent/executor.rs	0.00% <ø> (ø)
src-tauri/src/agent/query_history.rs	0.00% <ø> (ø)
src-tauri/src/capabilities/commands.rs	89.65% <100.00%> (+0.14%)	⬆️
src-tauri/src/capabilities/dockit.rs	90.38% <100.00%> (+0.09%)	⬆️
src-tauri/src/capabilities/dynamo.rs	94.14% <100.00%> (ø)
src-tauri/src/capabilities/es.rs	97.48% <100.00%> (ø)
src-tauri/src/capabilities/mongo.rs	83.77% <100.00%> (ø)
src-tauri/src/capabilities/registry.rs	92.35% <100.00%> (+0.04%)	⬆️
src-tauri/src/capabilities/types.rs	80.00% <ø> (ø)
src-tauri/src/agent/session_store.rs	0.00% <0.00%> (ø)
... and 2 more

... and 1 file with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.