feat(github): configurable quick-action presets and PR branch checkout (#689)

* feat(github): configurable quick-action presets and PR branch checkout

- Add workspace-scoped action presets (icon, label, hint, prompt template) for PRs and Issues, editable from GitHub settings with reset-to-defaults.
- When starting a task from a PR, check out the PR head branch directly in the worktree instead of branching off main.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* fix(github): extract action-preset service to keep service.go under line limit

Splits the preset CRUD methods out of the oversized service.go and applies prettier formatting to three frontend files flagged by CI.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* fix(github): address review feedback on action presets

- Prevent infinite refetch loop when fetching presets fails by tracking attempted workspaces in a ref instead of re-entering the effect on every loading-state change.
- Drop unused savePR/saveIssue helpers from the hook; only save() is consumed.
- Reorder the init spread in updateGitHubActionPresets/resetGitHubActionPresets so callers can't accidentally overwrite method/body.
- Tighten the GitHubActionPreset.icon type with string & {} so known icon keys keep autocomplete.
- Sharpen the eye-icon test to assert the exact IconEye mapping.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* fix(github): address second round of review feedback

- Seed preset editor drafts from current store state via lazy initializers so a warm mount shows the user's saved customisations instead of silently reverting to defaults when Save is clicked.
- Guard Reset button with its own in-flight state to prevent double-firing.
- Stop freezing resolved defaults into the stored row on a partial update; persist only what the store has for the untouched kind so future default improvements still reach those workspaces.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* refactor(github): tighten quick-actions editor UI

Replace the stacked PR/Issue editors and multi-line preset cards with a tabbed layout and single-line rows. Each row shows icon · label · hint inline; an "Edit prompt" toggle reveals the template textarea only when needed. Drops the redundant section headings, up/down reorder buttons, and verbose template helper label (hint moved into the textarea placeholder).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* fix(github): widen icon select trigger so the icon is visible

The icon select trigger had a fixed 40px width which the SelectTrigger's built-in chevron, padding, and icon gap all competed for, clipping the icon out of view. Drop the width override so the trigger sizes to its content.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: Kandev Agent <agent@kandev.dev>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

apps/backend/internal/github/controller.go

@@ -62,6 +62,10 @@ func (c *Controller) RegisterHTTPRoutes(router *gin.Engine) {
 	api.GET("/user/prs", c.httpSearchUserPRs)
 	api.GET("/user/issues", c.httpSearchUserIssues)
 
+	api.GET("/action-presets", c.httpGetActionPresets)
+	api.PUT("/action-presets", c.httpUpdateActionPresets)
+	api.POST("/action-presets/reset", c.httpResetActionPresets)
+
 	api.GET("/stats", c.httpGetStats)
 }
 
@@ -600,3 +604,51 @@ func (c *Controller) httpTriggerAllIssueChecks(ctx *gin.Context) {
 	}
 	ctx.JSON(http.StatusOK, gin.H{"new_issues_found": count})
 }
+
+// --- Action preset HTTP handlers ---
+
+func (c *Controller) httpGetActionPresets(ctx *gin.Context) {
+	workspaceID := ctx.Query("workspace_id")
+	if workspaceID == "" {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "workspace_id query parameter required"})
+		return
+	}
+	presets, err := c.service.GetActionPresets(ctx.Request.Context(), workspaceID)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	ctx.JSON(http.StatusOK, presets)
+}
+
+func (c *Controller) httpUpdateActionPresets(ctx *gin.Context) {
+	var req UpdateActionPresetsRequest
+	if err := ctx.ShouldBindJSON(&req); err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "invalid payload"})
+		return
+	}
+	if req.WorkspaceID == "" {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "workspace_id is required"})
+		return
+	}
+	presets, err := c.service.UpdateActionPresets(ctx.Request.Context(), &req)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	ctx.JSON(http.StatusOK, presets)
+}
+
+func (c *Controller) httpResetActionPresets(ctx *gin.Context) {
+	workspaceID := ctx.Query("workspace_id")
+	if workspaceID == "" {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "workspace_id query parameter required"})
+		return
+	}
+	presets, err := c.service.ResetActionPresets(ctx.Request.Context(), workspaceID)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	ctx.JSON(http.StatusOK, presets)
+}