fix(#4,#5,#7): remove dead cost field, fix stale fallback paths, mark quota as implemented

KNOWN_ISSUES.md

@@ -46,13 +46,13 @@ The `MitmConfig.modify_requests` flag exists and is plumbed through, but no actu
 
 ## 🟢 Low
 
-### 5. Wrapper Script Fallback Paths May Be Stale
+### ~~5. Wrapper Script Fallback Paths May Be Stale~~ ✅ FIXED
 
 **File:** `scripts/mitm-wrapper.sh` — `LS_FALLBACK_DIRS`
 
-The fallback glob patterns (e.g., `~/.cursor/extensions/antigravity.antigravity-*/...`) assume a specific extension naming convention. These are only used when no running LS process is found via `/proc` scanning (Method 1), which is the primary and robust discovery mechanism.
+~~Stale `.cursor`, `.vscode`, `.antigravity` glob patterns.~~
 
-**Impact:** Only affects `install` when the LS isn't running. Low priority.
+**Fixed:** Replaced with actual Antigravity install paths (`/usr/share/antigravity/`, `/opt/Antigravity/`, `~/.local/share/antigravity/`). Primary /proc-based discovery is unaffected.
 
 ---
 
@@ -70,43 +70,13 @@ The MITM module has unit tests for protobuf decoding and intercept parsing, but
 
 ## 🔍 Investigation
 
-### 7. LS Exposes Credit/Quota Data via `GetUserStatus`
+### ~~7. LS Exposes Credit/Quota Data via `GetUserStatus`~~ ✅ IMPLEMENTED
 
-**Confirmed via live probing.** The LS's `GetUserStatus` RPC already returns structured cost/quota data:
+**File:** `src/quota.rs`
 
-```json
-"planStatus": {
-    "planInfo": {
-        "planName": "Pro",
-        "monthlyPromptCredits": 50000,
-        "monthlyFlowCredits": 150000,
-        "monthlyFlexCreditPurchaseAmount": 25000,
-        "canBuyMoreCredits": true
-    },
-    "availablePromptCredits": 500,
-    "availableFlowCredits": 100
-}
-```
+~~Investigation item.~~
 
-Each model also includes **per-model quota info**:
-
-```json
-"quotaInfo": {
-    "remainingFraction": 0.2,
-    "resetTime": "2026-02-14T07:41:37Z"
-}
-```
-
-**Key findings:**
-
-- `GetUserStatus` is the single source for credit/quota data (exposed via `LanguageServerService`)
-- `SeatManagementService` methods (`GetPlanStatus`, `GetTeamCreditEntries`, `GetCascadeAnalytics`, `GetUserSubscription`) are **not routed through the LS** — they're backend-only
-- `PredictionService/RetrieveUserQuota` is also backend-only (not proxied by LS)
-- `GetUserAnalyticsSummary` returns empty `{}` (may not be implemented or requires different context)
-- `GetModelStatuses` returns empty `{}` (separate from the model configs in `GetUserStatus`)
-- `userTier` field shows subscription level: `{"id": "g1-ultra-tier", "name": "Google AI Ultra"}`
-
-**Potential use:** We could poll `GetUserStatus` periodically and expose `availablePromptCredits`, `availableFlowCredits`, and per-model `remainingFraction` via the `/v1/usage` endpoint — giving users real-time credit burn visibility without needing MITM token counting.
+**Implemented:** The `QuotaStore` polls `GetUserStatus` every 60s and exposes credit/quota data via `GET /v1/quota`. Shows plan info, prompt/flow credit balances, per-model remaining fraction, and reset timers.
 
 ---
 

scripts/mitm-wrapper.sh

@@ -33,10 +33,8 @@ CA_PATH="${REAL_HOME}/.config/antigravity-proxy/mitm-ca.pem"
 # Hardcoded paths are only used as a fallback if no LS process is running.
 LS_FALLBACK_DIRS=(
     "/usr/share/antigravity/resources/app/extensions/antigravity/bin"
-    "${REAL_HOME}/.antigravity/extensions/antigravity.antigravity-*/dist/bundled/language-server/bin"
-    "${REAL_HOME}/.cursor/extensions/antigravity.antigravity-*/dist/bundled/language-server/bin"
-    "${REAL_HOME}/.vscode/extensions/antigravity.antigravity-*/dist/bundled/language-server/bin"
-    "/opt/antigravity/language-server/bin"
+    "/opt/Antigravity/resources/app/extensions/antigravity/bin"
+    "${REAL_HOME}/.local/share/antigravity/resources/app/extensions/antigravity/bin"
 )
 
 BACKUP_SUFFIX=".real"