v1.1.0:3 — AI upgrades: history context, test connection, cost estimator, streaming preview

Four incremental upgrades to the AI program generator. No schema change, no /data migration.

1. History as context (the killer feature)
   - lib/ai/historyContext.ts builds a 90-day per-exercise rollup:
     frequency, recent weights, estimated 1RM (Epley), avg RPE,
     days-since-last, plus a STAGNANT flag when the heaviest weight in
     the new half doesn't beat the old half.
   - Generate page surfaces an "Include my workout history as context"
     checkbox (default on at >=10 logged workouts). When checked, the
     ~1-3 KB summary is appended to the system prompt so the model can
     recommend things like "you've stalled bench at 245 — try paused reps."
   - We deliberately don't ship raw set logs (privacy + token cost).

2. Test connection
   - POST /api/ai/test sends a tiny "say hi in 3 words" prompt and
     reports latency + first sample, or the error inline.
   - "Test connection" button next to "Save AI config" in
     Settings -> AI integration. Verifies provider/model/key/baseUrl
     without going through full program generation.

3. Cost estimator
   - lib/ai/pricing.ts ships a price table for major models
     (Claude 3.5/3.7/4/4.5, GPT-4o/5/o1/o3/o4-mini, Gemini 1.5/2.0/2.5).
     Ollama always returns 0; openai-compatible returns null.
   - Generation history shows per-row cost + a 30-day rolling total
     at the top of the page.

4. Streaming preview render
   - lib/ai/lenientJson.ts: stack-aware partial-JSON parser that
     auto-closes open strings/brackets/braces in reverse-of-opening
     order, drops dangling key:value pairs and partial keywords.
     Returns a best-effort snapshot of the program-so-far on each chunk.
   - Generate UI now renders a live "Building program..." panel that
     updates as weeks/days/exercises arrive instead of just showing
     raw text and waiting for stream end.

Tests: 26 new (ai-historyContext.test.ts, ai-lenientJson.test.ts,
ai-pricing.test.ts). 161 total pass.

start9/0.4/startos/versions/index.ts

@@ -8,6 +8,7 @@ import { v_1_0_0_6 } from './v1.0.0.6'
 import { v_1_0_0_7 } from './v1.0.0.7'
 import { v_1_1_0_1 } from './v1.1.0.1'
 import { v_1_1_0_2 } from './v1.1.0.2'
+import { v_1_1_0_3 } from './v1.1.0.3'
 
 /**
  * Version graph for the `proof-of-work` package.
@@ -25,9 +26,11 @@ import { v_1_1_0_2 } from './v1.1.0.2'
  * v1.1.0:1 — Programs UI (manual create / save / follow).
  * v1.1.0:2 — AI program generation, 5 providers (Claude / OpenAI /
  *            OpenAI-compatible / Gemini / Ollama).
+ * v1.1.0:3 — AI upgrades: history-as-context, test connection,
+ *            cost estimator, streaming preview render.
  */
 export const versionGraph = VersionGraph.of({
-  current: v_1_1_0_2,
+  current: v_1_1_0_3,
   other: [
     v_1_0_0_1,
     v_1_0_0_2,
@@ -37,5 +40,6 @@ export const versionGraph = VersionGraph.of({
     v_1_0_0_6,
     v_1_0_0_7,
     v_1_1_0_1,
+    v_1_1_0_2,
   ],
 })